Cook the quinoa according to package directions and set aside to cool slightly.
Season the chicken breast with half of the sea salt and black pepper.
Heat a non-stick skillet over medium-high heat and sear the chicken for 6-7 minutes per side until the internal temperature reaches 165°F.
While the chicken rests, dice the cucumber, halve the cherry tomatoes, and finely mince the red onion.
In a small bowl, whisk together the lemon juice, olive oil, minced garlic, and the remaining salt and pepper to create the dressing.
Slice the rested chicken breast into thin strips or bite-sized pieces.
In a large mixing bowl, combine the cooked quinoa, cucumber, tomatoes, red onion, fresh parsley, and mint.
Drizzle the lemon-herb dressing over the quinoa mixture and toss thoroughly to combine.
Plate the salad and top with the sliced chicken breast before serving.