Creating the amazing Creamy Italian Pasta Salad is straightforward with these clear steps:

1. Cook the Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook until al dente, following package instructions.
2. Drain and Rinse: Once cooked, drain the pasta and rinse under cold water to stop the cooking process. Set aside to cool.
3. Prepare the Vegetables: While the pasta cools, wash and chop the cherry tomatoes, cucumber, bell pepper, red onion, and slice the olives.
4. Combine Ingredients: In a large mixing bowl, combine the cooled pasta, chopped vegetables, mozzarella cheese, and salami or pepperoni if using.
5. Make the Dressing: In a separate bowl, whisk together the mayonnaise, sour cream, Italian dressing, red wine vinegar, garlic powder, Italian seasoning, salt, and pepper until smooth.
6. Mix Everything: Pour the dressing over the pasta and vegetables. Toss gently until everything is evenly coated.
7. Chill the Salad: Cover the bowl and refrigerate the salad for at least one hour to allow the flavors to meld.
8. Add Cheese: Before serving, fold in the grated Parmesan cheese and give it another gentle toss.

By following these simple instructions, you'll create a delightful dish that will impress anyone.