1/2 c. butter, melted
12 tbsp. horseradish mustard
12 tbsp. onion, finely chopped
Poppy seed
Processed Swiss cheese, sliced - 1 oz. per serving
2 1/2 lbs. shaved ham

Mix melted butter, horseradish mustard and finely chopped onion. Add poppy seed to taste. Spread both sides of buns with the filling. Add shaved ham and cheese. Wrap buns with aluminum foil and heat at 225 degrees until cheese is melted.