Bring a large pot of salted water to a boil. Add the rotini pasta and cook 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, bell pepper, black olives, and mozzarella cheese.

Pour the Italian dressing over the pasta salad and toss gently to combine. Adjust seasoning if necessary.

Chill in the refrigerator for at least 10 minutes before serving. Serve cold or at room temperature.