"Soy sauce, sherry, and thyme added early on helped boost flavor of our Slow-Cooker French Onion Soup recipe, but the addition of beef bones reproduced the rich meatiness of the classic. We microwaved the bones for a few minutes before placing them in the slow cooker to simulate roasting… read more..."
INGREDIENTS
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SOUP
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2 pounds beef bones (see note)
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4 tablespoons unsalted butter
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6 large yellow onions (about 4 pounds), quartered and cut into 1/4-inch-thick slices
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Salt and pepper
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1 tablespoon brown sugar
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1 teaspoon minced fresh thyme
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5 tablespoons all-purpose flour
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3/4 cup apple butter
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3/4 cup dry sherry
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1/4 cup soy sauce
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2 cups low-sodium chicken broth
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2 cups low-sodium beef broth
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CHEESE CROUTONS
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1 loaf French bread, cut into 1/2-inch slices
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2 1/2 cups shredded Gruyère cheese