Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Peel the carrots and slice them into 1-inch diagonal chunks to ensure even roasting.
In a small mixing bowl, whisk together the olive oil, maple syrup, garlic powder, sea salt, and black pepper until emulsified.
Place the chicken breast and sliced carrots onto the prepared baking sheet in a single layer.
Brush half of the maple-herb glaze over the chicken breast and toss the carrots in the remaining glaze until they are thoroughly coated.
Strip the fresh thyme leaves from the stems and sprinkle them evenly over the chicken and carrots.
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 carrots are fork-tender with caramelized edges.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the glazed carrots.