01 - Prepare pasta according to package directions until al dente. Drain thoroughly and rinse under cold water to stop cooking and cool quickly. Set aside.
02 - In a large mixing bowl, combine halved cherry tomatoes, diced red bell pepper, sliced red onion, diced cucumber, and chopped 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 evenly blended with a pink hue.
04 - Add cooled pasta to the vegetable mixture. Pour the dressing over the top and toss thoroughly until all ingredients are evenly coated.
05 - Gently fold in chopped parsley and shredded cheddar cheese if using.
06 - Refrigerate for at least 1 hour to allow flavors to meld. Serve cold, garnished with additional parsley if desired.