Cook the orzo pasta according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large bowl, combine the cooled orzo, cherry tomatoes, cucumber, red bell pepper, red onion, feta cheese, and parsley.
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.
Chill the salad in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.