"Classic and simple, this beef-broth based soup features the flavor of caramelized onions topped with grated Swiss and Gruyere cheese melted over the thick cubes of toasted bread...."
INGREDIENTS
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¼ cup Challenge Unsalted Butter (½ stick)
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6 medium yellow onions, thinly sliced (6 cups)
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1 Tablespoon all-purpose flour
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¼ teaspoon black pepper
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3 cans “lower sodium” beef broth (14 oz., each)
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1½ cups water
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¼ cup dry sherry
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1 cup grated Swiss cheese
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¼ cup grated Gruyere cheese
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6 slices sourdough French bread, toasted and cubed