01 - Preheat oven to 425°F (220°C) and line a baking sheet with parchment paper.
02 - In a large mixing bowl, toss the halved Brussels sprouts with olive oil, kosher salt, and black pepper until evenly coated.
03 - Spread the Brussels sprouts cut-side down in a single layer on the prepared baking sheet.
04 - Roast in the preheated oven for 20 to 25 minutes, stirring once halfway through, until golden and crisped at the edges.
05 - While the Brussels sprouts roast, whisk together the pure maple syrup, Dijon mustard, apple cider vinegar, and minced garlic in a small bowl.
06 - Transfer the roasted Brussels sprouts to a large bowl. Drizzle with the maple Dijon glaze and toss to ensure all pieces are evenly coated.
07 - Serve immediately, garnished with additional black pepper if desired.