4 oz. shell macaroni (about 1 c.)
1/2 c. mayonnaise
1/4 c. grated Parmesan cheese
2 tbsp. milk
1 1/2 c. cubed ham
1 c. chopped tomato
1 c. green pepper chunks
1/4 c. coarsely chopped onion

Cook, drain, and rinse macaroni. Combine mayonnaise, cheese and milk; mix well. Add remaining ingredients; mix. Mix lightly with shells. Chill and serve on lettuce. Serves 4.