Steps
1. In a mixing bowl, combine the diced cucumber, cooked quinoa, cherry tomatoes, and red onion.
2. In a separate small bowl, whisk together the olive oil, lemon juice, salt, and pepper.
3. Pour the dressing over the salad mixture and toss well to combine.
4. Taste and adjust seasoning if necessary.
5. Garnish with fresh parsley and serve immediately.