Preheat your oven to 400°F 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 1-inch bite-sized pieces.
In a small bowl, whisk together the olive oil, maple syrup, sea salt, black pepper, and garlic powder.
Place the carrots and chicken on the baking sheet and pour the maple mixture over them, tossing until every piece is well coated.
Spread the mixture into a single layer, ensuring no pieces are overlapping to allow for even browning.
Roast for 20 minutes, then remove from the oven and toss the ingredients.
Scatter the chopped pecans over the tray and roast for an additional 5 minutes until the chicken is cooked through and the pecans are fragrant.
Remove from the oven and garnish with fresh thyme leaves before serving.