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 1/2-inch thick diagonal coins to ensure they roast evenly.
Cut the chicken breast into 1-inch cubes, keeping the pieces uniform so they finish cooking at the same time as the vegetables.
In a large mixing bowl, whisk together the olive oil, maple syrup, apple cider vinegar, dried thyme, sea salt, and black pepper.
Add the chicken and carrots to the bowl, tossing well to ensure every piece is coated in the glossy maple glaze.
Spread the mixture onto the prepared baking sheet in a single layer, making sure not to crowd the pan.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is golden and the carrots are tender and browned at the edges.
Remove from the oven and serve immediately while the glaze is warm and fragrant.