Steps
1. In a mixing bowl, combine the cooked quinoa, cherry tomatoes, cucumber, bell peppers, red onion, and parsley.
2. In a separate small bowl, whisk together the olive oil, lemon juice, Dijon mustard, salt, and pepper to make the dressing.
3. Pour the dressing over the quinoa mixture and toss until well coated.
4. Let the salad marinate in the refrigerator for at least 30 minutes to allow the flavors to meld.
5. Serve chilled and enjoy!