01 - Preheat oven to 425°F and line a large baking sheet with parchment paper.
02 - In a large bowl, toss halved Brussels sprouts with olive oil, smoked paprika, garlic powder, salt, and black pepper until evenly coated.
03 - Spread Brussels sprouts in a single layer on prepared baking sheet, cut side down for optimal caramelization.
04 - Roast for 20 to 25 minutes, stirring once halfway through, until sprouts are golden brown and crispy on edges.
05 - Remove from oven and drizzle with balsamic vinegar if desired, tossing gently to combine.
06 - Transfer to serving platter, sprinkle with toasted nuts if using, and serve immediately.