Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel and slice the carrots into 2-inch batons, then toss them on the baking sheet with half of the olive oil, sea salt, and black pepper.
Roast the carrots for 20 minutes, tossing halfway through, until they are tender and starting to brown at the edges.
While the carrots roast, season the chicken breast evenly on both sides with garlic powder and the remaining salt and pepper.
Heat the remaining olive oil in a cast-iron skillet over medium-high heat and sear the chicken for 6 to 7 minutes per side until golden and cooked through.
Remove the carrots from the oven, drizzle with maple syrup and sprinkle with fresh thyme, then return to the oven for 3 minutes until the glaze is bubbly.
Plate the seared chicken alongside the glistening maple carrots and serve immediately.