Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Pat the chicken leg quarter completely dry with paper towels to ensure the skin becomes perfectly crispy during roasting.
In a small bowl, whisk together the dried rosemary, thyme, garlic powder, sea salt, and black pepper.
Rub the chicken with half of the olive oil and half of the herb seasoning blend, coating all sides thoroughly.
Toss the asparagus and sliced carrots in the remaining olive oil and the rest of the herb mixture until evenly coated.
Place the chicken on the prepared baking sheet and roast for 15 minutes.
Add the seasoned vegetables to the same baking sheet, spreading them out in a single layer around the chicken.
Continue roasting for another 20 to 25 minutes until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Allow the chicken to rest for 5 minutes before serving to lock in the savory juices.