Steps
1. In a bowl, combine the diced cucumber, cooked quinoa, cherry tomatoes, red onion, and parsley.
2. In a separate small bowl, whisk together the olive oil, lemon juice, salt, and pepper to make the vinaigrette.
3. Pour the vinaigrette over the salad and toss well to combine.
4. Let the salad sit for a few minutes to allow flavors to meld before serving.