Preheat your oven to 400°F and lightly grease a large ceramic baking dish with a tiny bit of oil.
Trim the Brussels sprouts and halve them, then peel and slice the carrots into half-inch rounds.
Pat the chicken breast dry with a paper towel to ensure the herbs stick and the skin gets a nice texture.
In a small bowl, combine the dried rosemary, dried thyme, garlic powder, sea salt, and black pepper.
Place the chicken and vegetables in the baking dish, drizzle with olive oil, and toss the vegetables to coat.
Rub the herb mixture evenly over both sides of the chicken and sprinkle the remaining seasoning over the vegetables.
Arrange the chicken in the center of the dish with the vegetables surrounding it in a single layer.
Bake for 35 to 40 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then garnish with fresh parsley.