Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the chicken breast completely dry with a paper towel to ensure the skin-like exterior gets crispy during roasting.
In a small bowl, whisk together the olive oil, rosemary, thyme, garlic powder, sea salt, and black pepper.
Place the chicken breast, broccoli florets, and sliced carrots on the prepared baking sheet.
Drizzle the herb oil mixture over the chicken and vegetables, tossing the vegetables and rubbing the chicken to coat thoroughly.
Spread everything into a single layer, ensuring the chicken has space around it for air circulation.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and browned.
Remove from the oven and drizzle the fresh lemon juice over the chicken and vegetables before serving.