Mayonaise • Cider vinegar • Prepared yellow mustard (optional) • Sugar • Salt • Pepper • Elbow macaroni (cooked as directed on box, rinsed with cold water & drained) • Chopped celery • Chopped red or green bell pepper • Chopped onion • as needed Chopped tomatoes if desired • Finely shredded cheddar cheese to sprinkle on top if desired