Cook the Pasta: Bring a large pot of salted water to a boil and cook the pasta according to package instructions until al dente. Drain and let it cool for a few minutes.

Combine the Veggies: In a large mixing bowl, gently combine the cooled pasta with cherry tomatoes, cucumbers, and red onion.

Prepare the Dressing: In a separate bowl, whisk together the mayonnaise, sour cream, lemon juice, garlic powder, salt, and pepper.

Mix it Together: Pour the dressing over the pasta and veggie mixture. Toss everything together until well combined.

Fold in the Cheese: Gently fold in the grated parmesan cheese.

Chill and Serve: Cover the bowl and chill the salad in the refrigerator for at least 30 minutes before serving.