INGREDIENTS
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4 tablespoons butter
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2 medium onions, cut into 1/4-inch slices (2 cups)
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1 cup Progresso™ beef flavored broth (from 32-oz carton)
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8 eggs
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1/2 cup milk
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1/2 teaspoon salt
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1/4 teaspoon pepper
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3 cups cubed (1/2-inch) French baguette or other firm-textured bread
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1 cup shredded Swiss cheese (4 oz)