Cook the rotini pasta according to package instructions until al dente. Drain and rinse under cold water to cool.

In a large bowl, combine the cooked pasta, cherry tomatoes, cucumber, bell pepper, red onion, black olives, feta cheese, and fresh basil.

In a small bowl, whisk together the olive oil, red wine vinegar, garlic powder, salt, and pepper.

Pour the dressing over the pasta salad and toss gently to combine all ingredients evenly.

Cover the bowl and refrigerate for at least 30 minutes to allow the flavors to meld.

Serve chilled or at room temperature.