Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Peel the carrots and slice them into 1/2-inch thick diagonal rounds; cut the chicken breast into bite-sized 1-inch cubes.
In a small bowl, whisk together the melted ghee, maple syrup, garlic powder, sea salt, and black pepper until well combined.
Place the chicken and carrots on the prepared baking sheet and pour the maple-ghee mixture over them, tossing thoroughly to ensure every piece is evenly coated.
Spread the ingredients into a single layer, ensuring they are not overcrowded to allow for proper browning.
Roast in the center of the oven for 20 to 25 minutes, tossing halfway through, until the chicken reaches an internal temperature of 165°F and the carrots are tender with caramelized edges.
Remove from the oven and garnish with fresh thyme leaves before serving warm.