1 (6 1/2 oz.) can tuna
1/4 c. diced cheese
1/2 c. chopped celery
2 tbsp. onion
4 to 6 buns
3 tbsp. mayonnaise

Drain tuna. Mix together tuna, cheese, mayonnaise and onion. Butter the buns, fill with tuna. Wrap them in aluminum foil. Bake at 350 degrees for 15 minutes. Makes 4 to 6 servings.