12 buns
1/2 lb. Swiss cheese
1 1/2 lbs. boiled ham
2 tbsp. yellow mustard
1 tbsp. poppy seed
2 tbsp. grated onion
1/2 c. butter

Combine mustard, poppy seed, and onion. Butter buns. Fill. Put sandwiches on cookie sheet and cover with foil. Poke a few holes in foil for steam to escape. Bake at 350 degrees for 20 minutes.