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 cooled pasta, cherry tomatoes, cucumber, bell pepper, spinach, red onion, feta cheese, and cooked chicken (or chickpeas).
In a separate 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.
Fold in the fresh parsley and basil, mixing until well distributed.
Chill the pasta salad in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.