Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
In a small bowl, whisk together the olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast on the baking sheet and brush the lemon-herb mixture over both sides of the meat.
Roast the chicken for 20 to 25 minutes, or until the internal temperature reaches 165°F.
While the chicken is roasting, steam the broccoli florets for 5 to 7 minutes until they are tender-crisp and bright green.
Warm the pre-cooked brown rice in a small saucepan or microwave until heated through.
Once the chicken is done, let it rest for 5 minutes before slicing it into strips.
Plate the fluffy rice and top with the sliced chicken, serving the steamed broccoli on the side.
Garnish the entire dish with finely chopped fresh parsley before serving.