01 - Preheat oven to 425°F. Line a rimmed baking sheet with parchment paper.
02 - In a large mixing bowl, whisk together the olive oil, balsamic vinegar, honey, minced garlic, kosher salt, and black pepper until well combined.
03 - Add the trimmed and halved Brussels sprouts to the bowl and toss thoroughly until every piece is evenly coated with the glaze.
04 - Spread the Brussels sprouts cut-side down on the prepared baking sheet in a single, even layer, leaving space between each piece.
05 - Roast for 22 to 25 minutes, stirring once halfway through, until the sprouts develop deep golden edges and a crispy exterior.
06 - Transfer the roasted Brussels sprouts to a serving dish. Drizzle with any remaining glaze from the pan and toss gently. Garnish with toasted nuts and Parmesan if desired. Serve immediately.