01 - Set the oven to 425°F and line a large baking sheet with parchment paper.
02 - In a large bowl, combine the sweet potato cubes with olive oil, brown sugar, cinnamon, nutmeg if using, salt, and pepper; toss until evenly coated.
03 - Spread the sweet potatoes evenly in a single layer on the prepared baking sheet.
04 - Roast for 25 to 30 minutes, stirring once halfway through, until tender and caramelized at the edges.
05 - Serve warm, optionally garnished with a sprinkle of cinnamon or fresh herbs.