- 1/4 cup butter
- 2 tablespoons horseradish mustard
- 2 teaspoons poppy seed
- 2 tablespoons minced onion
- 8 slices ham
- 8 slices Swiss cheese
- 8 buns
Spread mixture on both sides of buns. Add a slice of ham and a slice of cheese. Wrap in foil. Bake at 350 degrees for 20 minutes.