This creamy Macaroni Chicken Pasta Salad is a quick and easy side dish that is perfect for summer cookouts, potlucks, and easy lunches. Tender pasta is tossed with juicy chicken, crisp celery, red onion, and shredded carrots, then coated in a simple tangy mayonnaise dressing. It comes together in about 15 minutes and tastes even better after chilling in the refrigerator.