1 (12 oz.) can corned beef
1/2 c. green olives, chopped
1/4 c. onion, chopped
2 tbsp. Worcestershire sauce
1 c. shredded cheese (Mozzarella or American)
1/2 c. ketchup

Crumble corned beef. Add all other ingredients. Spoon into hamburger buns. Wrap in foil. Bake at 350 degrees for 20 minutes.