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, and cut the chicken breast into uniform 1-inch cubes.
In a large mixing bowl, whisk together the olive oil, maple syrup, sea salt, black pepper, and dried thyme until well combined.
Add the chicken cubes and sliced carrots to the bowl, tossing thoroughly to ensure every piece is coated in the maple mixture.
Spread the chicken and carrots onto the prepared baking sheet in a single layer, ensuring they are not overcrowded.
Roast in the oven for 20 to 25 minutes, tossing the ingredients halfway through to ensure even browning.
During the last 5 minutes of roasting, sprinkle the pecans over the tray to toast them until fragrant.
Remove from the oven once the chicken is cooked through and the carrots are tender and caramelized.
Serve immediately, drizzling any extra glaze from the baking sheet over the top.