1 head lettuce, broken up
1 1/2 c. chopped onion (use less, if desired)
1 1/2 c. celery, chopped
1 can water chestnuts, chopped
2 pkg. frozen peas, cooked and drained
2-3 c. mayonnaise
2 tbsp. sugar (substitute Equal, if desired)
1 1/2 c. Parmesan cheese

Layer in large bowl, starting with lettuce. Cover mayonnaise to edges. Top with Parmesan cheese. Chill overnight. Salad may be tossed before serving.