Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel to ensure the surface gets perfectly golden and crisp during roasting.
Peel and slice the carrots into 1/2-inch thick rounds, ensuring they are uniform for even cooking.
In a small bowl, whisk together the olive oil, lemon juice, rosemary, thyme, garlic powder, salt, and pepper.
Place the chicken and carrots on the prepared baking sheet, then drizzle with the herb oil mixture and toss until well-coated.
Arrange the chicken in the center and spread the carrots in a single layer around it to allow for proper airflow.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the carrots are tender and caramelized.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted carrots.