01 - Preheat oven to 400°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss sweet potato cubes with olive oil, brown sugar, cinnamon, salt, and pepper until evenly coated.
03 - Spread the coated sweet potatoes in a single layer on the prepared baking sheet.
04 - Roast for 25 to 30 minutes, turning once halfway through, until tender and caramelized.
05 - Transfer to a serving dish. Garnish with parsley or nuts if desired. Serve warm.