1 lb. hamburger
1 onion, chopped
1/4 green pepper, chopped
1/2 c. celery, chopped
1/2 c. ketchup
1 tsp. salt
1/4 tsp. pepper
1 tbsp. Worcestershire sauce
1 c. Velveeta cheese, shredded

Melt fat in heavy skillet. Add onion, green pepper and celery. Cook and stir 5 minutes. Add hamburger. Cook until all redness is gone. Add ketchup, salt, pepper, Worcestershire sauce and cheese. Cook slowly for 10 minutes. (Cover.) Cool. Refrigerate. May butter buns or use mustard mixture. Wrap in foil. Heat 30 minutes in oven at 350 degrees.