Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the carrots and slice them into 1-inch rounds, and cut the chicken breast into uniform bite-sized cubes.
In a small mixing bowl, whisk together the olive oil, maple syrup, sea salt, black pepper, and dried thyme until well combined.
Place the chicken and carrots on the prepared baking sheet and pour the maple mixture over them, tossing with your hands to ensure every piece is evenly coated.
Spread the ingredients out into a single layer to ensure they roast rather than steam.
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.
During the last 5 minutes of roasting, sprinkle the pecans onto the tray to let them toast until fragrant and golden.
Remove from the oven and serve immediately, drizzling any extra glaze from the pan over the chicken and carrots.