Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and carrots, then dice them into uniform 1-inch cubes to ensure even cooking.
Mince the garlic clove finely.
In a large mixing bowl, combine the chicken breast, diced sweet potato, and carrots.
Drizzle the olive oil over the mixture and add the minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are well-coated in the oil and herbs.
Spread the ingredients in a single layer on the prepared baking sheet, ensuring they aren't overcrowded so they roast rather than steam.
Place in the oven and roast for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing it into strips and serving alongside the roasted vegetables.