01 - Cook pasta according to package directions until al dente. Drain and rinse under cold water to cool; set aside.
02 - In a large mixing bowl, combine cherry tomatoes, red bell pepper, red onion, cucumber, and celery.
03 - In a separate bowl, whisk together mayonnaise, sour cream, ketchup, pickle juice (or vinegar), Dijon mustard, smoked paprika, garlic powder, salt, and pepper until smooth and pink in color.
04 - Add the cooled pasta to the vegetables. Pour the dressing over and toss until everything is evenly coated.
05 - Gently stir in chopped parsley and cheddar cheese if using.
06 - Chill in the refrigerator for at least 1 hour before serving for best flavor.
07 - Serve cold, garnished with extra parsley if desired.