Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Peel the sweet potato and carrots, then cut them into uniform 1-inch cubes for even roasting.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
In a large mixing bowl, toss the cubed sweet potatoes and carrots with half of the olive oil, half of the minced garlic, and half of the fresh herbs.
Place the chicken breast on the prepared baking sheet and rub with the remaining olive oil, garlic, herbs, sea salt, and black pepper.
Spread the seasoned root vegetables in a single layer around the chicken breast on the baking sheet.
Roast in 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.
Serve the sliced chicken alongside the roasted root vegetables for a complete, clean-eating meal.