1 c. elbow macaroni
1 c. chopped green pepper
1 c. chopped celery
1 (6 oz.) can tuna, drained
1 c. mayonnaise
1 can cream of mushroom soup

Cook macaroni; then combine all ingredients. Pour in well greased 13"x9"x2" casserole dish.

Bake at 375 degrees for 25 to 30 minutes. Mix cracker crumbs and Parmesan cheese as desired and spread on top for last 10 minutes of baking.