1 can tuna (leftover chicken or beef can be used also)
1 c. finely chopped celery
Minced onion
1/2 c. diced cheddar cheese
1/4 c. mayonnaise
Salt and pepper to taste
6 hamburger buns, buttered

Mix filling ingredients and fill buns. Place on cookie sheet and cover with foil. Bake at 350 degrees for 15 to 20 minutes.