Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel the carrots and slice them into 1/2-inch thick rounds on a diagonal for more surface area.
Cut the chicken breast into bite-sized 1-inch cubes to ensure even cooking with the vegetables.
In a small bowl, whisk together the maple syrup, olive oil, cinnamon, sea salt, and black pepper.
Place the chicken and carrots on the prepared baking sheet, drizzle with avocado oil and the maple mixture, then toss thoroughly to coat.
Spread the ingredients into a single layer, ensuring they aren't crowded so they roast rather than steam.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the carrots are tender with caramelized edges.
Remove from the oven and garnish with fresh thyme leaves before serving warm.