Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Prepare the produce by peeling the sweet potato and carrots, then dicing them into uniform 1-inch cubes to ensure even roasting.
Slice the chicken breast into 1-inch thick strips or bite-sized pieces so they finish cooking at the same time as the root vegetables.
In a large mixing bowl, whisk together the extra virgin olive oil, dried rosemary, dried thyme, garlic powder, sea salt, and black pepper.
Add the chicken, sweet potato cubes, and sliced carrots to the bowl, tossing thoroughly until every piece is well-coated in the herb-infused oil.
Spread the mixture onto the prepared baking sheet in a single layer, making sure the ingredients are not crowded so they roast rather than steam.
Place the sheet pan in the oven and roast for 22-25 minutes, or until the chicken is cooked through and the vegetables are tender with slightly browned edges.
Remove from the oven and allow the chicken to rest for 3-5 minutes before serving to ensure the meat stays moist and juicy.