Hot Ham Buns
["1/4 cup soft butter or margarine", "2 Tbsp horseradish mustard", "2 tsp poppy seeds", "2 Tbsp finely chopped onion", "4 hamburger rolls", "4 thin slices of ham", "4 slices of Swiss cheese"]
["Mix butter, mustard, poppy seeds and onion. Spread on rolls. Put a slice of ham and cheese in each roll. Wrap in aluminum foil. Bake at 300\u00b0 for 20 minutes. Makes four sandwiches."]
["butter", "horseradish", "poppy seeds", "onion", "hamburger", "thin slices of ham", "Swiss cheese"]