Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the extra virgin olive oil, maple syrup, balsamic vinegar, minced garlic, dried thyme, sea salt, and black pepper until well combined.
Place the chicken breast and the sliced carrots onto the prepared baking sheet, then drizzle the maple-balsamic mixture over everything, tossing to ensure an even coating.
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 and caramelized.
While the chicken and carrots are roasting, gently warm the pre-cooked lentils in a small saucepan over low heat.
Remove the tray from the oven, slice the chicken into strips, and serve immediately over the warm lentils, drizzling any remaining pan juices over the top.