Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the carrot and parsnip, then dice them along with the red potato into uniform 1-inch chunks to ensure they roast evenly.
In a large mixing bowl, whisk together the extra virgin olive oil, minced garlic cloves, rosemary, thyme, sea salt, black pepper, and lemon juice.
Add the diced root vegetables to the bowl and toss vigorously until every piece is thoroughly coated in the herb oil mixture.
Place the chicken breast on one side of the prepared baking sheet and spread the seasoned vegetables in a single layer on the other side.
Drizzle any remaining herb oil from the bowl over the chicken breast, using a brush or spoon to coat the top evenly.
Roast in the center of the oven for 25 to 30 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 against the grain to maintain its moisture, then serve immediately.