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

In a large mixing bowl, combine the cooked pasta, cherry tomatoes, cucumber, red onion, black olives, mozzarella balls, and fresh basil.

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

Season with salt and pepper to taste, and mix again.

Cover and refrigerate for at least 30 minutes before serving to allow flavors to meld.