Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the carrots and slice them into 1-inch diagonal chunks to ensure even roasting.
Place the chicken breast and the carrot chunks on the prepared baking sheet.
In a small mixing bowl, whisk together the olive oil, maple syrup, balsamic vinegar, sea salt, black pepper, and dried thyme.
Drizzle the maple mixture over the chicken and carrots, using your hands or a spatula to toss the carrots until they are thoroughly coated.
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.
Scatter the pecans onto the baking sheet during the final 5 minutes of roasting to allow them to become fragrant and toasted.
Remove from the oven, slice the chicken into strips, and serve immediately alongside the glazed carrots and pecans.