"These easy, cheesey baked sandwiches have a delightful and delicious buttery onion topping...."
INGREDIENTS
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12 petite bakery rolls
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1 lb sliced deli cooked ham
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1 lb sliced Swiss cheese
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1/4 cup butter
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1 cup diced onion
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1/2 teaspoon ground mustard
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1 tablespoon Worcestershire sauce