1 c. mayonnaise (not salad dressing)
2 tsp. lemon juice
2 tsp. grated onion
1/2 tsp. salt
2 1/2 c. cooked, diced chicken
1 c. chopped celery
1 c. chopped walnuts
1/2 c. grated sharp cheese
1 c. crushed potato chips

Blend mayonnaise with next 3 ingredients. Mix lightly with chicken, celery and nuts. Spoon into casserole. Sprinkle cheese, then chips on top. Bake at 400 degrees for 15 minutes or until piping hot.