Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
In a small bowl, whisk together the extra virgin olive oil, fresh lemon juice, dried oregano, garlic powder, sea salt, and black pepper to create a marinade.
Place the chicken breast on the prepared baking sheet and brush both sides generously with the lemon-herb mixture.
Roast the chicken in the oven for 20 to 25 minutes, or until the internal temperature reaches 165°F and the exterior is lightly golden.
While the chicken is roasting, steam the broccoli florets in a steamer basket over boiling water for about 5 minutes until they are tender-crisp and vibrant green.
Warm the pre-cooked brown rice in a small saucepan with a splash of water or in the microwave until steaming.
Remove the chicken from the oven and let it rest for 5 minutes before slicing it into thin strips to keep the meat juicy.
Plate the fluffy brown rice, top with the sliced chicken, and serve alongside the steamed broccoli, finishing with a garnish of fresh chopped parsley.