1/2 tbsp. poppy seed
1 tbsp. sesame seed
1/4 c. chopped onions
2 tbsp. catsup
2 tbsp. mustard
1/2 c. butter, softened
8 hamburger buns
4 - 8 slices Swiss cheese
8 slices ham

Mix poppy seed, sesame seed, onions, catsup, mustard, and butter. Spread on hamburger buns. Place 1/2 to 1 slice cheese and a slice of ham onto bun. Wrap individually in foil and bake at 250 degrees for 20 minutes.

Can be frozen and then heated.