Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the carrots and parsnips, then slice them into 1-inch thick rounds or bite-sized chunks.
In a large bowl, toss the sliced root vegetables with 0.5 tablespoons of the olive oil and a small pinch of the salt and pepper.
Pat the chicken breast dry with a paper towel and rub the surface with the remaining 0.5 tablespoons of olive oil.
In a small bowl, combine the dried rosemary, dried thyme, garlic powder, remaining sea salt, and black pepper to create a dry rub.
Season the chicken breast evenly on both sides with the herb mixture, pressing it into the meat.
Spread the vegetables onto the prepared baking sheet in a single layer and nestle the chicken breast in the center.
Roast for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are golden and tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it remains juicy.