Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel the carrots and parsnips, then slice them into 1/2-inch thick rounds.
In a mixing bowl, toss the sliced vegetables with 0.5 tablespoon of olive oil, half of the minced garlic, and a pinch of salt and pepper.
Place the chicken breast on the prepared baking sheet. Rub the remaining 0.5 tablespoon of olive oil over the chicken.
Sprinkle the chicken evenly with the chopped rosemary, thyme, remaining garlic, sea salt, and black pepper.
Spread the seasoned root vegetables in a single layer around the chicken on the baking sheet.
Roast in the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure the juices redistribute.
Plate the sliced chicken alongside the roasted vegetables and serve warm.