"French Onion Soup Casserole is the perfect combination of a classic soup and an easy casserole recipe...."
INGREDIENTS
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1 16 ounce baguette, cut into ¼-inch slices
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¼ cup 4 tablespoons unsalted butter
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2 large Vidalia onions (halved and cut top-to-bottom into ¼-inch-slices)
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3 large yellow onions
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1 teaspoon kosher salt
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½ teaspoon freshly ground black pepper
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5 fresh thyme sprigs (leaves removed)
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1 bay leaf
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½ cup dry sherry
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1 cups unsalted beef broth
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2 cups unsalted chicken broth
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8 ounces about 2 cups shredded Gruyere cheese