Preheat your oven to 400°F (200°C) and prepare a rimmed roasting pan.
Pat the turkey leg thoroughly dry with paper towels to ensure the skin achieves a perfect golden crisp.
In a small bowl, whisk together the extra virgin olive oil, minced rosemary, thyme, garlic powder, sea salt, and black pepper.
Peel and chop the carrots and parsnips into 1-inch chunks, then place them in the roasting pan.
Drizzle half of the herb oil mixture over the vegetables and toss to coat them evenly.
Rub the remaining herb oil mixture all over the turkey leg, ensuring it is well-coated under and over the skin.
Place the turkey leg on top of the vegetables in the pan.
Roast for 45 to 55 minutes, or until the turkey reaches an internal temperature of 165°F and the vegetables are tender and caramelized.
Remove from the oven and let the turkey rest for 5 to 10 minutes before serving to lock in the juices.