1 (7 oz.) can tuna
1 c. celery, diced
1/4 c. cheese, diced
1/4 c. olives, diced
1/4 c. mayonnaise
1 sm. onion, diced
1 doz. hamburger buns
Salt and pepper (optional)

Mix ingredients together. Spread on open-faced buns. Just before serving, heat oven to 350 degrees and bake for 15 minutes.