Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel to ensure the herbs stick and the meat roasts evenly.
Peel and slice the carrots and parsnips into uniform 1/2-inch thick rounds.
In a mixing bowl, toss the carrots and parsnips with half of the olive oil, half of the sea salt, and half of the black pepper.
In a small ramekin, combine the remaining olive oil with minced garlic, chopped rosemary, and thyme to create a herb rub.
Coat the chicken breast thoroughly with the garlic-herb mixture and place it on the center of the baking sheet.
Spread the seasoned root vegetables in a single layer around the chicken.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to retain its natural juices.