INGREDIENTS
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3 large yellow onions (peeled and sliced thin)
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3 tablespoons butter
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2 tablespoons brown sugar
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2 tablespoons Worcestershire sauce
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2 tablespoons garlic (minced)
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64.5 ounces low sodium beef broth (homemade OR 6 cans (10.75 ounces each))
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1 whole bay leaf
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1 sprig fresh thyme (or 1 teaspoon dried)
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6 slices French Bread (sliced)
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1 cup Swiss cheese (shredded)
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1 cup parmesan cheese (shredded)