In a large mixing bowl, combine the halved Brussels sprouts, chopped pecans, olive oil, maple syrup, balsamic vinegar, garlic powder, salt, black pepper, and cayenne pepper (if using).
Toss the ingredients together until everything is evenly coated in the mixture.
Spread the Brussels sprouts and pecans in a single layer on a baking sheet lined with parchment paper.
Roast in the preheated oven for 25-30 minutes, tossing halfway through, until the Brussels sprouts are golden brown and crispy on the edges.
Remove from the oven and let cool slightly.
Transfer the Brussels sprouts to a serving platter and drizzle any remaining maple syrup from the baking sheet over the top.
Garnish with chopped fresh parsley before serving.
Notes
Optional cayenne pepper adds a hint of heat.
Keyword Brussels sprouts, maple syrup, pecans, roasted vegetables