Ingredients:

3/4 Celery
3/4 Cheddar Cheese
1 Tuna
1 Onion
1/4 Mayonnaise
1/8 Salt
1/4 Butter
6 Margarine

Directions:

In a bowl, combine the first six ingredients.
Spread butter over cut sides of buns.
Spread tuna mixture on bun bottoms,replace tops.
Wrap in foil.
Bake at 350 for 15 minutes, or until the cheese is melted.