Easy Ham and Cheese Appetizer Sandwiches

By DOREENB

4.67 / 5

15min

12min

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