Step 1: Bring a large pot of salted water to a boil. Add the pasta and cook according to package directions until al dente. Drain and rinse under cold water to stop the cooking process.

Step 2: While the pasta cooks, prepare all your vegetables. Dice the cucumber and bell pepper into bite-sized pieces. Halve the cherry tomatoes and slice the olives. Finely chop the red onion. Cube the mozzarella cheese and quarter the pepperoni slices.

Step 3: In a large mixing bowl, combine the mayonnaise, Italian dressing, Parmesan cheese, Italian seasoning, and garlic powder. Whisk everything together until smooth and well combined.

Step 4: Add the cooled pasta to the bowl with the dressing. Toss until every piece is coated.

Step 5: Add all the prepared vegetables, mozzarella, and pepperoni to the bowl. Fold everything together gently but thoroughly.

Step 6: Season with salt and black pepper to taste.

Step 7: Cover the bowl and refrigerate for at least one hour before serving.