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

Mix together and heat until butter and mustard melts.

1 lb. ham, sliced
3/4 lb. Swiss cheese
2 pkg. dinner rolls

Split rolls horizontally and spread both sides with butter mixture. Then a layer of ham and a layer of cheese. Replace top of roll. Cover with foil and bake 10 to 15 minutes at 400 degrees.