Ingredients

1 7-ounce can tuna, drained
1 Cup chopped celery
1 small onion, chopped
1/2 Cup shredded Cheddar cheese
1/2 Cup ripe black olives, sliced
1/4 Cup mayonnaise
hamburger buns

Instructions

Mix together all ingredients except buns. Place desired amount on hamburger buns, wrap in foil and bake at 350 degrees for 15 to 20 minutes. (You may substitute chicken for the tuna.)