Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the carrots and parsnips, then slice them into 1/2-inch thick rounds or sticks to ensure they roast evenly with the chicken.
In a large mixing bowl, combine the chicken breast, sliced carrots, and sliced parsnips.
Drizzle the extra virgin olive oil over the mixture and add the minced garlic, chopped rosemary, and chopped thyme.
Season everything with sea salt and black pepper, tossing thoroughly to ensure every piece is well-coated in oil and herbs.
Spread the chicken and vegetables in a single layer on the prepared baking sheet, making sure not to overcrowd the pan so the vegetables can caramelize properly.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and golden brown.
Remove from the oven and let the chicken rest for 5 minutes before slicing to preserve the juices, then serve immediately.