Season the chicken breast evenly on both sides with sea salt, black pepper, and garlic powder.
Heat the olive oil in a medium skillet over medium-high heat.
Add the chicken to the skillet and cook for 6 to 7 minutes per side until the internal temperature reaches 165°F and the exterior is golden brown.
While the chicken is cooking, whisk together the tahini, lemon juice, and one teaspoon of warm water in a small ramekin until the dressing is smooth and pourable.
In a large serving bowl, arrange the baby kale as a base and top with the cooked quinoa, halved cherry tomatoes, and sliced cucumbers.
Remove the chicken from the pan, let it rest for two minutes, then slice into thin strips.
Place the sliced chicken over the quinoa and vegetables, then drizzle the creamy lemon-tahini dressing over the entire bowl before serving.