- 1/3 cup butter or margarine, softened
- 1/2 cup dried minced onion
- 1/3 cup prepared mustard
- 2 tablespoons poppy seeds
- 8 hamburger buns, split
- 16 slices deli ham
- 8 slices Swiss cheese
- In a bowl, combine butter, onion, mustard and poppy seeds. Spread about 1 tablespoon over both halves of buns. Layer ham and cheese on the bottom halves; replace tops. Wrap each sandwich in foil. Bake at 350 degrees F for 6-10 minutes or until cheese is melted, or freeze for up to 2 months.
- To use frozen sandwiches: Bake at 350 degrees F for 30-35 minutes or until cheese is melted.