01 - Set the oven to 425°F and line a baking sheet with parchment paper.
02 - In a large bowl, toss halved Brussels sprouts with olive oil, sea salt, and black pepper until evenly coated.
03 - Place the Brussels sprouts cut side down in a single layer on the prepared baking sheet to maximize caramelization.
04 - Cook for 20 to 25 minutes, stirring once halfway through, until sprouts are golden brown with crisp edges.
05 - While still warm, drizzle balsamic vinegar and honey or maple syrup if using over the sprouts and toss gently to coat.
06 - Transfer to a serving dish, garnish with chopped parsley if desired, and serve immediately.