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