Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Wash, peel, and slice the carrots into 1/2-inch thick rounds on a bias for more surface area to caramelize.
In a small mixing bowl, whisk together the honey, balsamic vinegar, olive oil, garlic powder, sea salt, and black pepper until smooth.
Place the chicken breast and sliced carrots onto the prepared baking sheet in a single layer.
Drizzle exactly half of the honey-balsamic glaze over the chicken and carrots, tossing the carrots with tongs to ensure they are fully coated.
Roast in the center of the oven for 10 minutes.
Remove the pan briefly to brush the remaining glaze over the chicken breast to build a thick, sweet crust.
Return to the oven and roast for another 10-12 minutes, or until the chicken reaches an internal temperature of 165°F and the carrots are fork-tender and browned.
Let the chicken rest for 3 minutes before slicing, then garnish the entire dish with chopped fresh parsley.