Preheat your oven to 400°F and line a small baking sheet with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon zest, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken breast on the prepared baking sheet and brush the lemon-herb mixture evenly over both sides.
Roast the chicken in the oven for 20 to 25 minutes, or until the internal temperature reaches 165°F and the outside is slightly golden.
While the chicken is roasting, steam the broccoli florets in a steamer basket over boiling water for 5 to 6 minutes until they are bright green and tender-crisp.
Warm the pre-cooked white rice in a small saucepan or microwave until steaming.
Remove the chicken from the oven and let it rest for 5 minutes before slicing it into thin strips.
Plate the fluffy rice, top with the sliced lemon chicken, and serve with the steamed broccoli on the side.