Hot Ham & Cheese Sandwiches

1/2 # butter
3 Tbsp mustard
1 small grated onion
1 bsp Worcestershire sauce
1 1/2 Tbsp poppyseeds
1# shaved ham
1/2 # shaved swiss cheese
16 hamburger buns (serves 16)

Soften butter & mix well with mustard, onion, Worcestershire & poppyseeds. Spread on both sides o buns. Fill generously with ham and cheese. Wrap in foil & place in oven at 275 for 20 minutes.