Baked Tuna Melts

1/2 pound American cheese, coarsely grated
2 tablespoons chopped stuffed green olives
3 hard boiled eggs, chopped
2 tablespoons chopped green bell pepper
2 tablespoons chopped sweet pickles
1 (7 ounce) can tuna fish, drained well
2 tablespoons chopped onion
1/2 cup mayonnaise

Mix all ingredients together. Put mixture on 8 buns. Wrap in foil. Bake in preheated 350 degree F oven for 30 minutes.