Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Peel the carrots and slice them into 1-inch diagonal chunks, and slice the chicken breast into even 1-inch strips.
In a small bowl, whisk together the extra virgin olive oil, maple syrup, Dijon mustard, sea salt, and black pepper until well combined.
Place the chicken and carrots on the prepared baking sheet, then pour the maple-dijon mixture over them, tossing thoroughly to ensure every piece is evenly coated.
Spread the ingredients into a single layer, ensuring they aren't overcrowded so they roast rather than steam.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken is cooked through and the carrots are tender and slightly charred on the edges.
Remove from the oven and immediately sprinkle with fresh thyme leaves before serving warm.