Best 10 Baked Onions Au Gratin Recipes

BAKED ONIONS AU GRATIN

Steps:

• Preheat oven to 350°.
• In a large bowl, combine onions, 1/2 cup mozzarella cheese, margarine, flour, milk, and salt; mix well.
• Spoon onion mixture into an ungreased medium baking dish.
• Sprinkle with remaining mozzarella cheese and bread crumbs.
• Bake until cheese is melted and bread crumbs are browned, about 30 minutes.

BAKED ONIONS AU GRATIN

Steps:

• Saute onions in butter.
• Place onions in a 9 x 13 casserole dish with a slotted spoon.
• Stir in heavy whipping cream, white wine, and black pepper. Mix well.
• Top with cheeses.
• Bake at 375 degrees for 15-20 minutes.

CREAMY AU GRATIN POTATOES

Steps:

• Preheat oven to 400 degrees F (200 degrees C). Butter a medium casserole dish.
• Layer 1/2 of the potatoes into bottom of the prepared casserole dish. Top with the onion slices, and add the remaining potatoes. Season with salt and pepper to taste.
• In a medium-size saucepan, melt butter over medium heat. Mix in the flour and salt, and stir constantly with a whisk for one minute. Stir in milk. Cook until mixture has thickened. Stir in cheese all at once, and continue stirring until melted, about 30 to 60 seconds. Pour cheese over the potatoes, and cover the dish with aluminum foil.
• Bake 1 1/2 hours in the preheated oven.

BAKED ONIONS

Steps:

• Peel the onions, but leave the root end intact. Pour about 2 inches of water into a large saucepan and set up a collapsible steamer inside. Steam the onions until easily pieced by a knife, about 30 minutes. (For more tender onions you may steam them a little longer; however, they might be somewhat harder to hollow out. Either way they're delicious!) Set aside to cool.
• Slice off about a third of the top portion of each onion. Using a paring knife, cut out the insides of each onion, leaving about 4 outside layers intact, to make a container for stuffing. Chop the onion insides and tops.
• Preheat the oven to 400 degrees F.
• Heat a large skillet over medium-high heat. Add the bacon and cook, stirring, until crispy and the fat has rendered, about 3 minutes. Add the chopped onion, herb sprigs, 1/8 teaspoon salt, and sugar. Season with pepper and cook, stirring occasionally, until lightly browned, about 12 minutes. Add the wine and cook until dry, scrapping the bottom of the skillet with a wooden spoon to get up any browned bits, about 2 minutes. Stir in the cream and remove from the heat. Remove and discard the herb sprigs. Stir in the cheese and mustard.
• Lightly butter a baking dish. Season the inside of the onions with salt and pepper, and spoon the stuffing into each onion cavity, mounding it slightly on top. Set the onions in the dish.
• Heat the butter in the skillet. Add the breadcrumbs and stir until they absorb the butter. Spoon the buttered breadcrumbs on top of each onion.
• Roast the onions until well browned and heated through, about 40 minutes. Serve warm or at room temperature.

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.

CRUNCHY BAKED TOMATO & ONION GRATIN

Steps:

• Heat oven to 180C/160C fan/gas 4. Heat half the oil in a pan and gently soften the onions and garlic for 15-20 mins until really soft and sticky but not browned. Put the onions, tomatoes (halve the large ones), herbs, sugar and breadcrumbs in a baking dish, season well and toss together.
• Drizzle with the remaining oil, scatter with a few more herb sprigs and bake for 1 hr until going golden on top and the tomatoes are juicy.

FRUGAL GOURMET'S BAKED ONIONS AU GRATIN

Steps:

• In two batches, sauté the onion in the butter in a large frying pan. Cook only until limp. Do not brown or discolor.
• Deglaze the pan, or remove the onion from the pan and pour sherry, scrapping the pan with a wooden spoon to dissolve the brown, toasted onions.
• Mix the onions, the sherry, nutmeg, salt, pepper and heavy cream together and place in a baking dish. Top with the Swiss and then Parmesan or Romano.
• Bake at 350 until top is a bit brown and bubbling, 15 - 20 minutes.

BAKED GREENS AND ONIONS AU GRATIN

Steps:

• Be sure greens are washed well and remove tough stems. This can be done ahead of time.
• Begin with a shallow dish sprayed with olive oil spray, (mine was 8X6 inch but 8X8 would work too). Layer 2 cups (tightly packed cups) of greens in the bottom of the dish. Lightly sprinkle with salt and pepper. Sprinkle 1/3 cup of parmesan over this and then pour on 1/2 cup of cream. The cream will sink to the bottom.
• On top of this, layer most of the cup of fresh onion cut into ringlets. Also, add all of the minced garlic. Then repeat with the last cup of packed greens, the rest of the onions and a bit more salt and pepper. You can always salt more later if needed, but if you oversalt, you can't undo it. Carefully, top with the cup of grated parmesan cheese, and bake 20-25 minutes in a preheated 350 degree oven. (It will be very full if using an 8X6 inch pan, but it cooks down.)
• Note: Prep time will be reduced greatly if you don't have to wash freshly picked greens like I had to do.

GRANDMA'S FAMOUS CREAMED ONIONS AU GRATIN

Steps:

• THAW 1 (14 ounce) bag Bird's Eye Frozen petite Whole Onions; LET drain; MINCE 1/4 teaspoon fresh thyme leaves; GRATE 1/2 cup Sharp Cheddar Cheese; SET aside.
• MELT 2 tablespoons butter in a 1-2 quart saucepan over medium heat; ADD drained onions; RAISE heat to medium-high; STIR onions constantly as they cook, until they begin to caramelize.
• SPRINKLE 2 tablespoons flour over onions; STIR for for 1 minute.
• DEGLAZE onions with 1/3 cup dry white wine; ADD the minced thyme; STIR, scraping the bottom, until wine evaporates.
• REDUCE heat to medium-low.
• ADD 1/3 cup cream or half and half; STIR until sauce is warmed and thickened.
• SEASON sauce with 1/4 teaspoon dry mustard (or prepared horseradish), 1 pinch freshly grated nutmeg, 1 pinch ground white pepper, and kosher salt, to taste.
• REMOVE from heat; ADD the grated cheese; STIR until cheese is completely melted.
• GARNISH with thinly snipped chives and SERVE.
• GET READY to melt into your seat after just one taste!

MUSHROOM AND ONION GRATINS

Steps:

• In a skillet cook the mushrooms in 2 1/2 tablespoons of the butter over moderately low heat, stirring, until they are softened and most of the liquid they give off has evaporated. Stir in the flour and cook the mixture, stirring, for 3 minutes.
• In each of six 1 1/2-cup gratin dishes layer the onions, the remaining butter, cut into bits, the mushroom mixture, and salt and pepper to taste, beginning and ending with a layer of onions, and pour 1 tablespoon of the cream over the top of each gratin. In a small bowl combine well the Gruyère and the bread crumbs and sprinkle the mixture over the cream. (Alternatively, the gratin, layered in the same manner, may be prepared in one 2-quart gratin dish.) Bake the gratins in the middle of a preheated 325°F. oven for 50 minutes to 1 hour, or until the onions are tender and the tops are golden. The gratins may be prepared 3 hours in advance, kept covered and chilled, and reheated in a preheated 400°F. oven for 5 minutes, or until they are heated through.