Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Peel and slice the carrots and parsnips into 1/2-inch thick rounds.
In a large bowl, toss the sliced root vegetables with 0.5 tbsp of extra virgin olive oil, half of the sea salt, and half of the black pepper.
Spread the vegetables in a single layer on one side of the prepared baking sheet.
Mince the garlic and combine it in a small bowl with the remaining 0.5 tbsp of olive oil, rosemary, thyme, and the rest of the salt and pepper.
Pat the chicken breast dry with a paper towel and rub the herb and garlic oil mixture evenly over all sides.
Place the chicken on the empty side of the baking sheet.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure the juices redistribute.
Serve the sliced chicken alongside the roasted root vegetables.