Easy Ham and Cheese Appetizer Sandwiches
Ingredients:
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1 cup butter, softened
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3 tablespoons poppy seeds
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1 onion, grated
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1 tablespoon Worcestershire sauce
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2 tablespoons prepared Dijon-style mustard
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2 (12 ounce) packages white party rolls
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½ pound chopped cooked ham
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5 ounces shredded Swiss cheese