Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Trim the ends of the Brussels sprouts and cut them in half lengthwise.
Cut the chicken breast into 1-inch bite-sized pieces to ensure even cooking.
Place the chicken and Brussels sprouts on the baking sheet and drizzle with olive oil.
Season with sea salt, black pepper, and garlic powder, then toss thoroughly to coat every piece.
Spread the ingredients in a single layer, ensuring the Brussels sprouts are cut-side down for maximum caramelization.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the sprouts are charred and tender.
In a small bowl, whisk together the balsamic glaze and honey until smooth.
Drizzle the balsamic mixture over the hot roasted chicken and sprouts immediately before serving.