Creating the perfect Creamy Pasta Salad is straightforward if you follow these steps:

1. Cook the Pasta: Begin by bringing a large pot of salted water to a boil. Add the rotini pasta and cook according to package instructions until al dente. Drain and rinse under cold water to stop the cooking process.
2. Prepare the Vegetables: While the pasta cools, chop the cherry tomatoes, cucumber, bell peppers, and red onion. Set aside.
3. Make the Dressing: In a large bowl, combine the mayonnaise, sour cream, apple cider vinegar, garlic powder, Italian seasoning, salt, and pepper. Mix until smooth and creamy.
4. Combine Ingredients: Add the cooled pasta to the bowl with the dressing. Stir until the pasta is well coated. Then, add the chopped vegetables and thawed peas. Gently mix everything together until evenly distributed.
5. Chill the Salad: Cover the bowl with plastic wrap or a lid and refrigerate for at least 30 minutes. This allows the flavors to meld and intensify.
6. Serve the Salad: After chilling, give the salad a gentle stir. If needed, add a little more mayonnaise or sour cream to achieve your desired creaminess.
7. Garnish and Enjoy: Serve the salad in a large bowl or individual portions. Add fresh parsley on top for an extra touch of color and flavor.

These simple steps will guide you to create a delicious and creamy pasta salad that everyone will love.