In a large pot of boiling salted water, cook the fusilli pasta according to package instructions until al dente. Drain and rinse under cold water to stop the cooking process. Set aside.
While the pasta is cooking, chop the cherry tomatoes, cucumber, bell pepper, red onion, and slice the black olives and pepperoncini peppers.
In a large mixing bowl, combine the cooled pasta, cherry tomatoes, cucumber, bell pepper, red onion, black olives, and pepperoncini peppers.
In a separate bowl, whisk together the Italian dressing, dried oregano, garlic powder, salt, and pepper. Pour this dressing over the pasta and vegetable mixture.
Gently toss all the ingredients together until evenly coated with the dressing.
Cover the bowl with plastic wrap and place it in the refrigerator for at least 30 minutes to allow the flavors to meld together.
Once chilled, give the pasta salad a quick toss, then transfer it to a serving bowl. Optionally, sprinkle grated Parmesan cheese on top and garnish with fresh basil leaves.
Notes
Adjust the amount of pepperoncini peppers to taste.