Begin by cooking the rotini pasta according to the package directions. Aim for an al dente texture, then drain the pasta and rinse it under cold water to halt the cooking process and cool it down.
In a large mixing bowl, combine the cooled rotini, diced chicken, bacon bits, halved cherry tomatoes, diced cucumber, shredded cheddar cheese, and chopped red onion, mixing them gently to combine.
In a separate mixing bowl, whisk together the mayonnaise, Dijon mustard, and lemon juice until smooth. Season with salt and pepper to taste, adjusting to your preference.
Drizzle the creamy dressing over the pasta mixture and toss everything together thoroughly, ensuring that all the ingredients are evenly coated in the dressing.
Sample the salad and adjust the seasoning, if desired, by adding more salt or pepper.
Cover the prepared pasta salad with plastic wrap or a lid and refrigerate it for at least 30 minutes. This chilling period allows the flavors to meld beautifully.
Just before serving, sprinkle the pasta salad with freshly chopped parsley to add a vibrant touch and enhance presentation.
Notes
For an eye-catching display, serve the salad in a large decorative bowl or portion it into individual mason jars for a fun, portable option.