Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Pat the chicken breast dry with a paper towel to ensure the herbs stick and the meat browns properly.
In a small bowl, whisk together the olive oil, rosemary, thyme, garlic powder, and a pinch of salt and pepper.
Brush the herb oil mixture evenly over both sides of the chicken breast.
Place the chicken on the prepared baking sheet and bake for 20 to 25 minutes, or until the internal temperature reaches 165°F.
While the chicken is baking, prepare the brown rice according to package instructions if not already cooked.
Steam the broccoli florets over a pot of boiling water for 5 to 7 minutes until they are tender-crisp and vibrant green.
Once the chicken is finished, let it rest for 5 minutes before slicing to keep the juices inside.
Plate the sliced chicken alongside the warm brown rice and steamed broccoli, drizzling any remaining pan juices over the meat.