SUBSTITUTE FOR FRENCH ONION SOUP RECIPES

Steps:

• Melt butter in a heavy Dutch oven over medium heat. Add onions and 1/2 teaspoon salt, stir and cover, letting onions soften for 5 minutes. Remove lid and let onions caramelize until golden brown over medium heat, stirring occasionally. Adjust heat if onions are browning too quickly. The caramelization process may take 45 to 60 minutes.
• Meanwhile, warm broth in a saucepan over low heat.
• Once onions are caramelized, add wine and sherry to the pot and allow mixture to come to boil. Stir in flour and let thicken for a minute or two.
• Slowly add warm broth, 1/4 teaspoon salt and the pepper to the onion mixture and boil uncovered for 10 minutes. Add more salt and pepper to taste.
• Heat the broiler, and arrange individual ovenproof casseroles on a baking sheet. Ladle soup into casseroles, and cover top with bread slices. Sprinkle each casserole generously with Gruyère. Broil for a minute or two, watching carefully, until cheese melts and browns. Serve immediately.

Steps:

• Heat oil in a large, heavy pot over medium. Add onions and cook, stirring occasionally, until soft and beginning to turn golden, 35 to 40 minutes (if onions develop color quickly, reduce heat).
• Add butter, garlic, thyme, bay leaf, 2 teaspoons salt, and 1/4 teaspoon pepper. Cook, stirring a few times, until golden brown, 15 to 20 minutes more. Add vermouth and boil, scraping up browned bits from bottom of pot, until mostly evaporated, 1 to 2 minutes.
• Stir in stock and Marsala. Bring to a boil, then reduce heat to low and gently simmer 45 minutes. Season to taste.
• Preheat broiler. Ladle soup into broiler-safe crocks or bowls set on a rimmed baking sheet. Nestle a piece of toast into each, partially submerged, and top each with 1/3 cup Gruyère. Broil until cheese is melted, bubbly, and golden brown in places, 2 to 4 minutes. (Soup without toast and cheese can be cooled and refrigerated in an airtight container up to 3 days, or frozen up to 6 months.)