1 lb. Velveeta cheese, diced
2 (7 oz.) cans tuna
1/2 c. chopped olives
1 (10 oz.) can tomato puree
2 tbsp. onion, minced
2 tbsp. green pepper, chopped
2 tbsp. celery, diced

Mix and let stand several hours in refrigerator. Spread generously on hamburger buns (16). Wrap in foil and bake 45 minutes at 250 degrees.