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