Preheat your oven to 425°F (220°C).
Pat the chicken breast dry with paper towels and season both sides with salt, black pepper, and garlic powder.
Slice the carrot and parsnip into even sticks or rounds for uniform roasting.
In a bowl, toss the sliced vegetables with olive oil, dried thyme, dried rosemary, a pinch of salt, and a dash of pepper until evenly coated.
Place the seasoned chicken breast on one side of a large, oven-safe baking sheet. Arrange the vegetables on the other side, ensuring they are spread out in a single layer.
Bake in the preheated oven for approximately 25-30 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly caramelized.
For extra crispiness on the chicken, you can broil for an additional 2-3 minutes at the end, keeping a close eye to avoid burning.
Remove from the oven and let rest for a few minutes before serving to allow juices to redistribute.