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 1/2-inch thick diagonal rounds to ensure even roasting.
In a small mixing bowl, whisk together the maple syrup, olive oil, fresh thyme, and half of the sea salt and black pepper.
Place the carrot rounds in a bowl and toss with the maple-thyme mixture until every piece is thoroughly coated.
Season the chicken breast evenly on both sides with the lemon juice, garlic powder, and the remaining sea salt and black pepper.
Arrange the carrots and the chicken breast on the prepared baking sheet in a single layer, ensuring they are not overcrowded.
Roast in the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the carrots are tender and slightly caramelized.
While the oven does the work, cook the quinoa according to the package instructions until it is light and fluffy.
Slice the roasted chicken and serve it alongside the glazed carrots over the bed of cooked quinoa.