Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Wash the brussels sprouts, trim the ends, and cut them in half lengthwise.
In a large bowl, toss the sprouts with 0.5 tbsp of olive oil, garlic powder, and half of the salt and pepper.
Spread the sprouts on the baking sheet in a single layer and roast for 20-25 minutes until the edges are charred and tender.
While the sprouts roast, season the chicken breast with the remaining salt and pepper.
Heat the remaining 0.5 tbsp of olive oil in a skillet over medium-high heat and cook the chicken for 6-7 minutes per side until the internal temperature reaches 165°F.
In a small saucepan, combine the balsamic vinegar and maple syrup, simmering over low heat for 3-5 minutes until it thickens into a glaze.
Slice the chicken into strips, combine with the roasted sprouts, and drizzle the balsamic glaze over everything before serving.