Best 20 Onion Gratin Recipes

BUTTERNUT SQUASH, APPLE, ONION AU GRATIN

Steps:

• Preheat oven to 350. Spray 9- x 11-inch glass baking pan with cooking spray.
• Place flour, salt, and cinnamon into a large plastic bag. Add squash, apples, and onions; shake until lightly dusted.
• In glass dish, layer 1/2 of squash, apples, and sweet onion. Pour 1/2 cup chicken stock over the top, then sprinkle 1/2 of cheese. Layer with remaining squash, apple, and onions. Pour remaining chicken stock over the top, and cover with foil.
• Bake in preheated oven for 40 minutes.
• Take out and sprinkle with bacon crumbles and remaining cheese. Return, uncovered, to oven; bake for another 5 minutes. Let sit for 5 minutes before serving.

SPINACH, CARAMELIZED ONION, AND MUENSTER AU GRATIN POTATOES

Steps:

• Preheat an oven to 400 degrees F (200 degrees C). Combine the potatoes and spinach in a 9x13-inch baking dish; set aside.
• Melt 3 tablespoons of butter in a saucepan over medium-low heat. Stir in the onion, and cook until dark brown, about 15 minutes. Stir in the garlic and cook until fragrant, about 1 minute. Add butter and when melted, add flour. Cook and stir until golden, 2 to 3 minutes. Season with salt, and stir in the milk and cream. Bring to a simmer over medium heat; cook and stir until the sauce has thickened, about 10 minutes. Stir in 3/4 of the Muenster cheese until melted, and pour over the potatoes.
• Cover the potatoes with aluminum foil, and bake in the preheated oven 30 minutes. Uncover, and cook 20 minutes more, then sprinkle with the remaining Muenster cheese, return to the oven, and bake until the potatoes are tender and the cheese is bubbly, about 10 minutes more.

CREAMED CORN GRATIN WITH FRIED ONION RINGS AND BACON

Steps:

• Preheat oven to 350°F. Spread breadcrumbs on rimmed baking sheet. Bake until lightly toasted, about 10 minutes.
• Sauté bacon in large skillet over medium heat until crisp. Using slotted spoon, transfer bacon to paper towels. Transfer 2 tablespoons bacon drippings to heavy large pot; reserve for creamed corn. Discard remaining drippings.
• Place flour in medium bowl. Sprinkle with salt and pepper. Separate red onion slices into rings and toss in flour to coat lightly. Heat 1/2 cup oil in same large skillet over medium-high heat. Working in batches, add onion rings to skillet and cook until golden brown, adding more oil as needed, about 2 minutes per side. Transfer onion rings to paper towels. Mix breadcrumbs, bacon, onion rings, and half of green onions in clean medium bowl. Sprinkle topping with salt and pepper.
• Butter 13x9x2-inch glass baking dish. Add butter to pot with reserved bacon drippings; melt over medium-high heat. Add chopped onion; sauté until light golden and beginning to soften, about 6 minutes. Add frozen corn; sauté 5 minutes. Add milk and cream; bring to boil. Gradually stir in grits and cayenne pepper. Reduce heat and simmer until mixture thickens slightly, about 3 minutes. Remove from heat. Stir in cheese and remaining green onions. Season with salt and pepper. Transfer creamed corn to prepared dish. (Topping and corn can be made 1 day ahead. Cover separately and chill.)
• Preheat oven to 350°F. Bake gratin uncovered 25 minutes. Sprinkle topping over; bake until topping is slightly crisp and creamed corn thickens and is heated through, about 20 minutes longer.

POTATO, CARAMELIZED ONION, AND GOAT CHEESE GRATIN

Steps:

• In a heavy 5- to 6-quart kettle heat oil over moderate heat until hot but not smoking and cook onions with thyme and salt and pepper to taste, stirring occasionally, until golden, about 15 minutes. Reduce heat to moderately low and cook, stirring frequently to keep from scorching, until golden brown. Remove kettle from heat.
• While onions are cooking, bring a large saucepan of salted water to a boil for potatoes. Peel potatoes and cut crosswise into 1/4-inch-thick slices. Add potatoes to boiling water and cook 5 minutes from time water returns to a boil. Drain potatoes well in a colander.
• Preheat oven to 425°F. and lightly oil a 2- to 2 1/2-quart gratin dish or other shallow baking dish.
• Arrange half of potatoes, overlapping slightly, in dish and season generously with salt and pepper. Cover potatoes with onions, spreading evenly, and top with goat cheese. Arrange remaining potatoes, overlapping slightly, over cheese and season generously with salt and pepper. Dot gratin with butter. Gratin may be prepared up to this point 2 hours ahead and kept at room temperature, covered.
• Pour milk evenly over potatoes and bake 35 minutes, or until potatoes are tender and top is golden. Gratin may be made 1 day ahead and chilled, covered. Reheat gratin before serving.

SWEET POTATO, APPLE AND ONION GRATIN

Steps:

• Preheat oven to 350 degrees.
• Butter 13X6 inch oval baking dish.
• Melt butter in heavy large skillet over medium heat.
• Add onions and saute until tender, about 10 minutes.
• Toss apples with flour in medium bowl.
• Arrange half of sweet potatoes in bottom of prepared dish.
• Top with half of apple slices.
• Arrange remaining potatoes and then remaining apples.
• Cover with sauteed onions.
• Pour stock over all.
• Bake until sweet potatoes are tender, about 45 minutes.
• Mix breadcrumbs, cheese and bacon in small bowl, then sprinkle mixture over potatoes.
• Bake an additional 20 minutes.
• Broil until topping browns, if needed.
• Let cool 5 minutes before serving.

SWEET POTATO, ONION, AND APPLE GRATIN

Steps:

• Preheat oven to 400°F. Butter and flour 15x10x2-inch baking dish. Spread 1/3 of potato slices over bottom of dish. Arrange 1/2 of onion slices, then 1/2 of apple slices over. Sprinkle with 1 tablespoon lime juice, 1 tablespoon sugar, and 1/3 cup cream. Dot with 1 tablespoon butter. Sprinkle with salt and pepper. Repeat layering. Arrange remaining potato slices on top. Drizzle with remaining 1/3 cup cream. Dot potatoes with remaining 1 tablespoon butter. Sprinkle with salt and pepper.
• Cover dish with foil. Bake until potatoes and apples are tender, about 45 minutes. Increase oven temperature to 500°F. Remove foil. Bake until potatoes are golden brown, about 10 minutes.

BLUE CHEESE MUSHROOM AND ONION POTATO GRATIN

Steps:

• Heat oil and butter in a skillet; saute the onions until caramalized (about 10-12 minutes) remove with a slotted spoon to a bowl.
• Add in the sliced mushrooms and saute until they loose there moisture (about 10 minutes) transfer to a bowl.
• Set oven to 375 degrees (oven rack to second-lowest position).
• Butter a 3-4 quart casserole dish.
• In a 2-quart saucepan combine the potatoes with the whipping cream (the potatoes on top do not have to be covered completely) bring to a boil; remove from heat and cool to warm (about 30 minutes) leaving the potatoes in the cream.
• Transfer one-third of the potatoes using a slotted spoon to the baking dish, spreading them out in an even layer.
• Sprinkle with HALF of the onions, then HALF of the mushrooms; season with salt and pepper.
• The sprinkle ONE-THIRD of both cheeses over the mushrooms.
• Make another layer of potatoes then the sprinkle the REMAINING onions and mushrooms over the potatoes then another third of both cheeses.
• Make one more layer with the remaining potatoes.
• Top with remaining cheeses.
• Pour any leftover whipping cream evenly over the top and cover tightly with foil.
• Make for 45 minutes.
• Increase the oven temperature to 400 degrees.
• Remove the foil and bake until the top is golden brown, and the potatoes are fork-tender (about 12-15 minutes).
• Let stand for 15 minutes before serving (the mixture will thicken upon standing).

MOM'S CHEDDAR ZUCCHINI, TOMATO, & ONION GRATIN

Steps:

• Preheat oven to 400 degrees Fahrenheit.
• In an 8" x 8" baking dish, lay the zucchini, then the onions, then the tomatoes. Top with a pinch of salt and pepper, then sprinkle the cheddar cheese on top.
• Bake uncovered for 30 minutes, or until the vegetables are tender and the cheese melted.
• Top with fresh basil if desired and serve.

SWEET ONION POTATOES AU GRATIN

Steps:

• Heat a small skillet with the butter over medium heat. Add the onions, season with salt ground thyme, bay leaf and cook until very soft and sweet and lightly caramelized, 20 minutes. Season with salt and pepper, to taste, and discard the bay leaf.
• While the onions cook, put the potatoes in a medium pot and cover with water. Bring to a boil, then salt the water and cook to tender, 12 to 15 minutes. Drain and return the potatoes to the hot pot. Mash the potatoes with the cream and Parmesan and season with salt and pepper, to taste.
• Preheat the broiler.
• Arrange the mashed potatoes in individual gratin dishes or 1 shallow casserole. Top the potatoes with the onions and Gruyere cheese. Put them on a sheet pan and brown under a hot broiler until bubbly, about 2 minutes. Remove from the oven and serve hot.

APPLE, POTATO AND ONION GRATIN

Steps:

• preheat oven to 400 degrees. butter a 13x9 pyrex.
• melt 6 T butter in a large nonstick skillet over medium heat. add onion, thyme and 2 t salt; saute until onion are translucent, about 10 minutes.
• increase heat to medium-high; saute until onion are tender and begin to color, about 8 minutes longer. remove from heat. add remaining 6 T butter, 2/3 c water, wine, and sugar to skillet; stir and swirl skillet to combine. bring to a boil, then cool onion mixture to lukewarm.
• combine potatoes, apples, remaining 2 t salt and onion mixture in large bowl; toss gently to blend.
• transfer to prepared baking dish, spreading evenly. cover dish with parchment paper, then cover with foil, shiny side down.
• bake gratin until potatoes are tender, about 55 minutes. uncover and bake until top browns and juices bubble thickly, about 20 minutes longer.
• (can be made 6 hours ahead. let stand uncovered at room temperature. rewarm, loosely covered with foil, in 300 degree oven for 20 minutes.) let gratin stand 15 minutes before serving.

FOUR-ONION GRATIN

Steps:

• Melt butter in heavy large skillet over medium heat. Add leeks, large onions, shallots and garlic and sauté until all are tender, about 20 minutes. Add baby onions and cook 10 minutes longer, stirring occasionally. Mix in 2 cups whipping cream. Boil until cream is thickened to sauce consistency, about 10 minutes. Transfer vegetable-cream mixture to 6-cup shallow baking dish. (Can be prepared 1 day ahead. Cover and refrigerate. Return mixture to room temperature before continuing.)
• Preheat oven to 425°F Sprinkle breadcrumbs over onion mixture. Bake until breadcrumbs are golden brown and onion mixture bubbles, about 20 minutes. Sprinkle with parsley.

CREAMED ONION GRATIN

Steps:

• Preheat the oven to 375 degrees. Lightly grease a gratin dish or medium casserole.
• Cut off the root and tip of the onions. Slice in half length-wise and peel. Lay the cut-side of the onion down and slice length-wise into thick wedges.
• In a Dutch oven or heavy pot, melt two tablespoons of butter over medium heat. Add the onions and cook, stirring occasionally, until soft and caramelized, about 40 minutes. Add the sherry and simmer until it evaporates. Remove the onions from the pan and pour through a fine mesh sieve. Let them drain while making the bechamel sauce. (Draining the onions prevents a runny gratin because the onions will continue to release more liquid in the oven.)
• In the same Dutch oven, melt 3 tablespoons of butter over medium heat. Stir in the flour and cook for one minute. Add the scalded milk and cook, whisking constantly, until the sauce is very thick. Remove from the heat. Fold in the Gruyere and stir until completely melted. Season with salt and pepper, to taste. Add the onions to the cheese sauce and toss to thoroughly coat. Pour the onion mixture into the gratin dish.
• Melt the remaining tablespoon of butter and toss with the panko crumbs. Sprinkle over the top of the onions and bake until bubbly and golden brown, about 30 minutes. Serve warm.

ROASTED SQUASH AND RED ONION GRATIN WITH QUINOA

Steps:

• Preheat oven to 425 degrees. Cover a baking sheet with parchment or foil. Toss squash with 1 tablespoon of the olive oil and season with salt and pepper. Spread on baking sheet in an even layer. Place in oven and roast for about 30 minutes, stirring every 10 minutes, until tender and caramelized. Remove from the oven and turn the heat down to 350 degrees. You should have about 2 cups roasted squash.
• Meanwhile, heat remaining olive oil in a medium skillet and add onion. Cook, stirring, until it begins to wilt, about 3 minutes. Add leek and a generous pinch of salt and cook, stirring, until onion and leek are tender, another 3 to 5 minutes. Add garlic and thyme and cook, stirring, until the garlic is fragrant, 30 seconds to a minute. Remove from the heat.
• Oil a 2-quart baking dish or gratin. In a large bowl, beat eggs and add salt and pepper to taste (I use about 1/2 teaspoon salt). Whisk in milk. Add onions and leek mixture, squash, Parmesan and quinoa, and combine well. Scrape into the prepared baking dish.
• Bake 35 to 40 minutes, until set and the top is lightly browned. Remove from the oven and allow to cool for 10 minutes or longer before serving.

SWEET POTATO GRATIN WITH CARMELIZED ONION AND PARMESAN CHEESE

Steps:

• Preheat oven to 375°F. Oil a 8" x 8" baking dish. In a skillet, heat butter and add onions and garlic on low heat and cook for 15 minutes. Place 1 layer of sliced potatoes overlapping slightly, 1 layer of onions, drizzle cream and sprinkle with parsley, and 1/4 cup of parmesan. Continue to make layers until the dish is filled. Sprinkle remaining parmesan to top layer. Cover with foil and bake for 40 minutes and then uncover and continue baking for another 25 minutes until potatoes are tender and top is brown. Let it rest for 15 minutes. Additional Notes: Substitute parmesan with goat cheese.

POTATO, ONION AND TOMATO GRATIN

Steps:

• Preheat oven to 400 degrees
• Generously oil the gratin dish. Make a layer of potatoes, a layer of onions and a layer of tomatoes in the baking dish, sprinkling each layer with a little of the salt and pepper and drizzling each layer with 1/2 tablespoon of the olive oil. Repeat with another layer of potatoes, onions and tomatoes, again sprinkling each with a little of the salt and pepper and drizzling each with 1/2 tablespoon of the olive oil.
• Combine the Pecorino Romano, bread crumbs and oregano in a bowl.
• Bake in the preheated oven for about an hour or until the potatoes are tender when pierced with a knife. After 50 minutes of cooking, top with the Pecorino Romano, bread crumbs and oregano and the remaining 5 tablespoons of olive oil. Continue cooking until the potatoes are cooked and the bread crumbs are brown and crispy. Serve immediately.
• Prepare ahead...Cook the gratin up to 1 day ahead but to not add the bread crumbs, cheese and oregano. Allow to cool and store in the refrigerator, covered tightly. When ready to serve, remove the gratin from the refrigerator up to 2 hours ahead. Preheat oven to 400. Mix bread crumbs, cheese and oregano and spread evenly on top of the gratin. Spoon over the remaining olive oil and bake in the oven and back in the oven for about 20 minutes, until the topping is brown and crispy. Serve immidiately.

WARM ONION-POTATO GRATIN

Steps:

• Combine Yukon Gold potatoes and sliced onions in heavy large saucepan. Add enough water to cover. Bring water to boil. Reduce heat and simmer until potatoes are almost tender, about 3 minutes. Drain potato-onion mixture well.
• Arrange half of potato-onion mixture in 11x7-inch glass baking dish. Sprinkle with salt and pepper. Sprinkle mixture with 1/3 cup Gruy&ère cheese, then 2 tablespoons Parmesan cheese. Arrange remaining potato-onion mixture atop cheeses. Pour cream over. Sprinkle with salt and pepper, then remaining 2/3 cup Gruy&ère cheese and 6 tablespoons Parmesan cheese. (Can be prepared 8 hours ahead. Cover and refrigerate.) Preheat oven to 400°F. Bake gratin uncovered until cream thickens, about 25 minutes. Remove from oven. Preheat broiler. Broil gratin until top is golden, about 2 minutes.

FRENCH ONION SOUP AU GRATIN STUFFED MEATBALLS RECIPE - (4.4/5)

Steps:

• 1.In a large nonstick pan over medium-low heat, saute onions and butter stirring occasionally until golden brown and caramelized. 2.Add the thyme, salt, water, bouillon, and wine. Cook over medium heat until reduced by half. Let cool. 3.Combine the milk soaked bread, ½ cup panko, parsley, pepper, salt, and egg in a bowl and mix together until everything is a happy gloopy mess. Mix in the ground beef with your hands until the gloopy mess is evenly distributed into the meat. If necessary to make the meat formable, mix in additional ¼ cup of panko. 4.Grab a small handful of the meat and flatten in your palm. Add some cheese and onions, and fold meat over and around it, sealing the edges as best as you can. This is a messy process. Repeat until all meat has been stuffed. 5.In a large nonstick skillet, heat canola oil over medium high heat. Brown meatballs on all sides. Remove to an oven safe dish when browned. Don't worry about these cooking all the way through. They will finish cooking in the oven. 6.Make sauce by combining all ingredients in a saucepan, and simmering for 10 minutes. Pour over meatballs, and top the meatballs with any extra onions, with the shredded mozzarella cheese, and any extra provolone you didn't use to stuff the meatballs. 7.Bake at 350 for 30 minutes, Remove, top with fresh chopped parsley, and serve with mashed potatoes.

HEARTY ONION SOUP GRATIN

Steps:

• Heat oil in a skillet over mediumheat. Cook onions untilsoft and translucent, about 8 minutes.Reduce heat to low. Addthyme, and cook, stirring occasionally,until onions are deepgolden brown, 35 to 40 minutes.Season with salt and pepper.
• Preheat broiler with rack about6 inches from heat source.Bring beef stock to a boil. Addcarrots and turnips. Reduceheat, and simmer, covered, untilvegetables are almost tender,about 5 minutes.
• Divide vegetables evenlyamong 4 ovenproof bowls usinga slotted spoon. Divide onionsamong bowls. Add 1 bay leaf toeach. Set bowls on a rimmedbaking sheet. Divide hot stockamong bowls.
• Top each with 1 slice of bread,then 2 slices of cheese. Broiluntil cheese is golden and bubbling,about 5 minutes. Transferto 4 serving bowls if desired.

FRENCH ONION PIZZA AU GRATIN

Steps:

• In a large skillet, saute onion with brown sugar in 1 tablespoon oil until softened. Reduce heat to medium-low; cook, stirring occasionally, for 30 minutes or until deep golden brown. Stir in vinegar and garlic. Remove from the heat; add bourbon if desired. Continue cooking until liquid is nearly evaporated., In another skillet, saute mushrooms in remaining oil until tender; add roast beef and heat through., Place crust on a pizza pan; spread with French onion dip. Layer with mozzarella cheese, onion mixture, red pepper, mushroom mixture and Gruyere cheese., Bake at 425° for 10-15 minutes or until cheese is melted. Sprinkle with rosemary.

LEG OF LAMB ROASTED OVER POTATO-ONION GRATIN RECIPE - (4.2/5)

Steps:

• Prepare Lamb: Rub garlic paste all over lamb. Rub olive oil all over the leg, then generously season with salt and pepper. Set lamb aside at room temperature for 2 hours. Prepare Gratin: Preheat oven to 400 degrees. Choose a baking dish large enough to hold lamb comfortably. Rub interior of dish with the cut side of a halved garlic clove. In the dish, place potatoes, 1 teaspoon thyme, 1 teaspoon salt, 1 teaspoon pepper, garlic, and 2 teaspoons olive oil. Toss everything together and spread potatoes out in an even layer across dish. In a medium bowl, toss 2 yellow onions together with 1 teaspoon thyme , 1 teaspoon salt, 1 teaspoon pepper and 2 teaspoons olive oil. Evenly scatter onions over top of potatoes. Pour wine over vegetables. Place baking dish with gratin on lowest oven rack. If dish is not large enough to hold lamb and catch all drippings, place a baking sheet or piece of aluminum foil under dish. Place leg of lamb directly on rack above gratin and make sure baking dish is positioned so it catches all drippings. Roast 15 minutes, then lower oven temperature to 350 degrees. Continue roasting lamb until meat thermometer inserted into thickest part registers 125 degrees for medium-rare, about 1¼ hours. (For medium doneness, cook until temperature reads 135 degrees; for medium-well, 145 degrees.) Check gratin after 1 hour of cooking. If potatoes are fork-tender, remove gratin from oven. If the roast needs more cooking time, place (or leave) a baking sheet or aluminum foil on rack beneath lamb to catch drippings. Once lamb reaches desired doneness, transfer to a cutting board and let rest at least 10 minutes. While lamb and potatoes roast, make Salsa Verde: In a small bowl, mix parsley, mint, thyme, vinegar, honey, olive oil, salt and pepper. Add more olive oil, vinegar and salt as needed. Serve lamb with gratin and salsa verde alongside.