1/2 lb. ham, shredded in blender
1/2 lb. Swiss cheese, grated separately
1 1/2 sticks butter, softened
3 tbsp. mustard
3 tbsp. poppy seed
1 med. onion, minced
1 tsp. Worcestershire sauce
3 dozen party rolls

Slice rolls lengthwise, leaving together on one side. Mix butter, mustard, poppy seed, onion, and Worcestershire sauce. Spread on both sides of rolls. Sprinkle ham on one side and then cheese on ham. Put other side of rolls over ham/cheese and press firmly. Wrap in foil and heat 30 minutes at 350 degrees.