Hot Ham And Cheese Sandwiches - cooking recipe

Ingredients

1/2 c. butter
1/2 c. chopped onion
2 Tbsp. poppy seed
1/2 c. mustard
8 large hamburger buns
8 slices Swiss cheese
8 slices thin sliced ham

Preparation

Combine the first 4 ingredients and spread on bun.
Put 1 slice cheese and 1 slice ham on each bun.
Wrap in foil.
Heat in oven 15 minutes.
May be frozen.