01 - Preheat the oven to 425°F and line a baking sheet with parchment paper.
02 - In a large bowl, toss the Brussels sprouts with olive oil, kosher salt, and black pepper until evenly coated.
03 - Spread the Brussels sprouts in a single layer, cut side down, on the prepared baking sheet.
04 - Roast for 20 to 25 minutes, flipping once midway, until the Brussels sprouts are deeply golden and crispy on the edges.
05 - Whisk together the maple syrup and balsamic vinegar in a small bowl.
06 - Transfer the roasted Brussels sprouts to a serving bowl, drizzle with the maple-balsamic glaze, and toss to coat evenly.
07 - Sprinkle with toasted pecans and grated parmesan cheese if desired. Serve immediately.