Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Trim the ends off the brussels sprouts and slice them in half vertically.
In a large bowl, toss the halved sprouts with olive oil, garlic powder, sea salt, and black pepper until evenly coated.
Spread the sprouts onto one side of the baking sheet, ensuring they are cut-side down for maximum caramelization.
Season the chicken breast with a pinch of salt and pepper and place it on the other side of the baking sheet.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the sprouts are tender and charred.
While roasting, whisk together the balsamic vinegar and honey in a small bowl to create the glaze.
Remove the sheet pan from the oven, slice the chicken, and drizzle the balsamic glaze over the crispy sprouts before serving.