1 pkg. hamburger buns
1/2 lb. boiled ham
1 stick butter, melted
1 tbsp. poppy seed
2 tbsp. horseradish sauce
2 tbsp. chopped onion
1 pkg. Swiss or American cheese

Mix butter and poppy seed, mustard and onion. Spread on both sides of bun. Add ham and cheese. Wrap in foil. Bake at 300 degrees for 20 minutes. Serves 6.