Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and carrots, then dice them into uniform 1-inch cubes for even cooking.
Mince the garlic cloves finely.
In a large mixing bowl, combine the diced sweet potato, carrots, and the whole chicken breast.
Drizzle with extra virgin olive oil and sprinkle with 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 mixture onto the prepared baking sheet in a single layer, ensuring the chicken is not covered by vegetables.
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.
Let the chicken rest for 5 minutes before slicing and serving alongside the roasted root vegetables.