Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel the sweet potato and carrots, then chop them into uniform 1-inch cubes for even cooking.
Mince the garlic clove and finely chop the fresh rosemary and thyme leaves.
In a large mixing bowl, combine the turkey breast, cubed sweet potatoes, and sliced carrots.
Drizzle with olive oil and sprinkle with the minced garlic, sea salt, black pepper, rosemary, and thyme.
Toss the ingredients thoroughly until everything is well-coated in the herb oil.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the turkey piece has space around it.
Roast in the center of the oven for 25 to 30 minutes, or until the turkey reaches an internal temperature of 165°F and the vegetables are tender.
Remove from the oven and let the turkey rest for 5 minutes before slicing it into medallions.
Serve the sliced turkey alongside the roasted root vegetables.