Blend:

1/2 lb. butter
3 tbsp. poppy seed
1 med. onion, chopped fine
1 tsp. Worcestershire sauce
3 tbsp. prepared mustard

Split Pepperidge Farm party rolls; spread top and bottom with the above mixture. Place on rolls:

1 lb. boiled ham, shredded
1/2 lb. Swiss cheese, cut into sm. squares

Wrap tightly in foil. Heat in foil 10 minutes at 400 degrees.