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, diced chicken, cherry tomatoes, romaine lettuce, and grated Parmesan cheese.
In a small bowl, whisk together the Caesar dressing, black pepper, garlic powder, and salt.
Pour the dressing over the pasta mixture and toss until everything is evenly coated.
If desired, sprinkle croutons on top for added crunch.
Chill the salad in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.