1 (8 oz.) pkg. shell macaroni
1 c. mayonnaise
1/3 c. celery, chopped
1 tbsp. onion, chopped
1 1/2 tsp. salt
1/4 tsp. pepper
1 (7 oz.) can tuna, flaked
1/4 c. green pepper, chopped

Cook macaroni according to package directions. Drain, rinse with cold water, drain again. Mix with mayonnaise and onion. Cool, add remaining ingredients. Chill. 6 servings.