24 slices ham
24 hamburger buns
2 tbsp. poppy seeds
1/2 onion, grated
24 slices Swiss cheese
1/2 lb. butter
5 tbsp. mustard

Mix together the butter, poppy seeds, mustard, and onion. Spread each bun with a tablespoon of butter mixture. Place 1 slice of ham and cheese on each bun. Wrap each bun in foil and heat for 20 minutes at 350 degrees. Can be frozen. If frozen, bake for 30 minutes. Handy to keep in freezer.