1/4 c. soft butter
2 tbsp. horseradish mustard
2 tbsp. poppy seed
2 tbsp. onion (opt.)
8 sesame seed dark rye buns
8 slices ham
8 slices Swiss cheese

Mix and spread on inside of each bun, put a slice of ham and a slice of cheese. Wrap each bun in foil. Warm in a 350 degree oven for 15 to 20 minutes.