INGREDIENTS
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2 Tbsp. butter or margarine
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1-1/2 lbs. yellow or sweet onions, thinly sliced
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2 cans (10-1/2 oz. each) beef broth
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1 cup dry white wine
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4 slices Italian or sourdough bread, toasted
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4 slices Sargento® Deli Style Sliced Swiss Cheese