2 cans (6 oz. each) water packed albacore tuna, drained and flaked
1/2 cup chopped celery
1 small onion, finely chopped
1 cup shredded cheddar cheese
1/2 cup chopped green olives
1/4 cup mayonnaise
dash of ground black pepper
4 hamburger buns, split

Preheat oven to 350°F.

In large bowl, combine tuna, celery, onion, cheese, olives, mayonnaise and pepper. Divide tuna mixture evenly among buns. Wrap sandwiches loosely in aluminum foil. Place on baking sheet.

Bake 15 to 20 minutes or until heated through.