Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and carrots, then chop them into uniform 1-inch cubes to ensure they cook at the same rate.
In a small mixing bowl, whisk together the extra virgin olive oil, minced garlic, dried rosemary, dried thyme, sea salt, and black pepper.
Place the chicken breast and the chopped root vegetables onto the prepared baking sheet.
Drizzle the garlic-herb oil mixture over the chicken and vegetables, using your hands or tongs to toss everything until thoroughly and evenly coated.
Spread the ingredients out into a single layer, making sure the chicken breast has enough space around it to roast rather than steam.
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 and lightly caramelized.
Remove from the oven and let the chicken rest for 5 minutes before slicing it into strips.
Garnish the entire dish with finely chopped fresh parsley and serve immediately.