In a large pot of salted boiling water, add the orzo pasta. Cook according to package instructions until al dente, usually about 8-10 minutes. Drain and rinse under cold water to stop the cooking process. Drain thoroughly.
While the orzo cooks, chop the cherry tomatoes, cucumber, and red onion, and place them in a large mixing bowl.
Once the orzo is cool, add it to the bowl with the vegetables. Gently mix in the chopped dill and crumbled feta cheese.
In a small bowl, whisk together the olive oil, lemon juice, lemon zest, salt, and pepper until well combined.
Pour the dressing over the orzo salad and toss until everything is evenly coated.
Cover the salad and refrigerate for at least 30 minutes to allow flavors to meld. Toss again before serving.
Notes
Chill for at least 30 minutes before serving for best flavor.