Best 3 Vegetarian French Onion Soup Recipes

VEGETARIAN FRENCH ONION SOUP

Steps:

• Melt butter and olive oil in a pot over medium heat. Add red onions and sweet onions; sprinkle with kosher salt and sugar. Cook, stirring frequently, until onions are very tender and caramelized, about 45 minutes.
• Pour mushroom broth, sherry, Worcestershire sauce, parsley, herbes de Provence, and bay leaves into onion mixture. Bring to a simmer and cook over medium-low heat for 45 to 60 minutes.
• Reduce heat to low and remove bay leaves. Pour balsamic vinegar into soup and adjust seasoning. Mix well.
• Place Parmesan cheese rind in the center of the pot and submerge, but do not stir. Cook soup for an additional 20 minutes.
• Set an oven rack about 6 inches from the heat source and preheat the oven's broiler.
• Arrange bread slices on a baking sheet.
• Broil bread slices in the preheated oven for 2 to 3 minutes per side. Remove from the oven and set aside.
• Carefully remove cheese rind from the pot and discard.
• Fill 4 oven-safe bowls evenly with soup and sprinkle each with a light layer of grated Gruyere cheese and Parmesan cheese. Top each with 2 bread slices and sprinkle each with remaining Gruyere cheese and Parmesan cheese. Place bowls on a baking sheet.
• Broil soup in the preheated oven until cheese is browned and bubbling, 3 to 5 minutes.

VEGETARIAN FRENCH ONION SOUP WITH MUSHROOMS

Steps:

• Melt butter in a medium pot over medium-high heat. Add onions, chopped scallions, thyme sprigs, and bay leaf. Cook, stirring frequently and gradually lowering heat to prevent scorching, until onions are soft and golden brown, about 20 minutes. Stir in mushrooms; season with salt and pepper. Cook, stirring occasionally and scraping browned bits from bottom of pan, until mushrooms have released most of their moisture, about 15 minutes. Stir in 4 cups water and bring to a boil; reduce heat and simmer 5 minutes. Discard thyme sprigs and bay leaf; season with salt and pepper.
• Preheat broiler with rack 6 inches from heating element. Divide soup among 4 ovenproof bowls. Top each with a bread slice; sprinkle with cheese. Broil until cheese is melted and golden brown in spots, 2 to 3 minutes. Sprinkle with thyme leaves and scallion tops.

VEGETARIAN STOUT FRENCH ONION SOUP

Steps:

• Toss mushrooms and flour together in a bowl until coated.
• Heat olive oil in a large skillet over medium heat; cook and stir coated mushrooms until browned, 5 to 10 minutes.
• Combine potatoes, carrots, onion, garlic, and rosemary in a large stockpot; top with cooked mushrooms. Stir beer, vegetable broth, tomato paste, Worcestershire sauce, salt, and pepper into vegetable mixture. Cover stockpot and cook over medium-high heat until vegetables are tender and soup flavors have blended, about 1 hour.
• Whisk water and cornstarch together in a bowl until dissolved; stir into soup until thickened, about 3 minutes.
• Set oven rack about 5 inches from the heat source and preheat the oven's broiler.
• Arrange bread slices on a baking sheet and sprinkle Swiss cheese over each slice.
• Broil bread in the preheated oven until cheese is melted and golden, about 1 minute.
• Ladle soup into bowls using a slotted ladle; top each with a bread slice. Ladle broth over bread until saturated.