Preheat oven to 400 degrees F. Line a baking sheet with parchment paper.
In a mixing bowl, mix the olive oil, vinegar, and syrup. Add the Brussels sprouts and toss until coated. Season with salt and pepper. Transfer to baking sheet, and bake for 25-30 minutes or until slightly charred.
While the Brussels are baking, heat a skillet over medium heat. Add pine nuts and toast until fragrant, about 2-3 minutes. Be careful not to burn them.
When the brussels are finished, serve and top with pine nuts. Enjoy!
Be sure to spread the Brussels out in a single layer, and leave enough room between them to allow the liquid to cook off without "steaming" them. This will ensure that you get the crispiest sprouts possible!