1 lb. boiled ham
1/2 stick butter
3 tbsp. mustard
1 tbsp. Worcestershire sauce
2 tsp. poppy seeds
1 med. onion, chopped
Swiss cheese

Spread mix on buns, lay cheese slices on top. Wrap in foil and freeze. Bake 10 minutes at 400 degrees, thawed; 30 minutes at 400 degrees, frozen.