Boil the rotini pasta in salted water until al dente.
Drain the pasta and rinse it under cold water to stop the cooking process.
In a large bowl, mix together the cooled pasta, diced chicken, crumbled bacon, cherry tomatoes, cucumber, red onion, and cheddar cheese until evenly combined.
In a small bowl, blend the mayonnaise, Dijon mustard, apple cider vinegar, and a pinch of salt and pepper until creamy.
Drizzle the dressing over the pasta mixture, tossing gently to ensure every ingredient is coated.
Cover the bowl with plastic wrap and let it chill in the refrigerator for at least 30 minutes to enhance the flavors.
When ready to serve, give the salad a quick stir and sprinkle with fresh parsley for a burst of color.