Cook the orzo two minutes less than it says on the box. Drain and rinse in cold water. Place in a large bowl.
Add the cucumber, tomatoes, chickpeas, red onion, dill, and olives and toss to combine.
In a small bowl whisk together the lemon juice, vinegar, olive oil, water, dijon mustard, garlic powder, oregano, salt, and pepper.
Pour over top of the orzo salad and mix to combine.
Service with feta sprinkled on top if desired.