Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel and dice the sweet potato and carrots into 1-inch cubes to ensure they roast at the same rate.
In a large mixing bowl, combine the chicken breast, diced sweet potatoes, and carrots.
Drizzle the olive oil over the chicken and vegetables, then add the minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and herbs.
Spread the mixture in a single layer on the prepared baking sheet, making sure the chicken pieces aren't crowded.
Roast in the center of the oven for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and golden.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays juicy and tender.
Serve the sliced chicken alongside the roasted root vegetables for a complete, clean-eating meal.