3 tbsp. mustard
2 sticks butter
3 tbsp. poppy seed
1 sm. onion, grated
1 tbsp. Worcestershire sauce
1/2 to 3/4 lb. boiled ham, chopped
1/2 lb. Swiss cheese, grated
3 pkg. Pepperidge Farm party rolls

Soften butter. Combine all ingredients except ham and cheese. Split rolls and spread butter mixture on both sides of rolls. Sprinkle ham and cheese over spread; put rolls together and place in original aluminum container. Cover with tin foil and bake at 350 degrees for 10-12 minutes. May be frozen; bake longer if frozen.