Season the chicken breast evenly with sea salt, black pepper, garlic powder, and dried oregano on both sides.
Heat the extra virgin olive oil in a medium skillet over medium-high heat.
Cook the chicken for 6 to 7 minutes per side until the exterior is golden brown and the internal temperature reaches 165 degrees Fahrenheit.
While the chicken is cooking, dice the cucumber, halve the cherry tomatoes, and finely mince the red onion.
In a small mixing bowl, whisk together the lemon juice with a tiny pinch of sea salt.
Prepare the base of the bowl by adding the warm cooked quinoa to the center.
Once the chicken is finished, let it rest for 3 minutes before slicing it into thin strips.
Arrange the sliced chicken over the quinoa and top with the cucumber, tomatoes, red onion, olives, and crumbled feta cheese.
Drizzle the lemon juice over the entire bowl and serve immediately.