Combine mayonnaise, water, vinegar, sugar, ... in refrigerator. Cook macaroni for 12 minutes, drain well. ... in refrigerator overnight. Salad will be juicy at first, but thickens as it sets.
Good for summer picnics or ... prepare ahead! Mix macaroni, mayonnaise, onion, celery, salt ... last. Let the salad set for 24 hours - ... the recipe calls for.