Hot Ham and Cheese Sandwiches

Details

Ingredients

• ¼ cup butter, softened
• 2 tablespoons prepared horseradish mustard
• 2 tablespoons chopped onions
• 1 teaspoon poppy seeds
• 1 teaspoon dill seed
• 8 slices Swiss cheese
• 8 slices cooked ham
• 8 hamburger buns