Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel the carrots and sweet potato, then dice them into uniform 1-inch cubes to ensure they roast at the same rate.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
In a large mixing bowl, combine the olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper.
Add the chicken breast and the diced vegetables to the bowl, tossing thoroughly until every piece is coated in the herb-infused oil.
Spread the chicken and vegetables in a single layer on the prepared baking sheet, making sure they are not overcrowded.
Roast for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and golden brown.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure the meat remains juicy and tender.