01 - Set the oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, toss the sweet potato cubes with olive oil, brown sugar, cinnamon, salt, and black pepper until coated evenly.
03 - Spread the seasoned sweet potatoes in a single layer on the lined baking sheet.
04 - Roast for 25 to 30 minutes, turning once halfway through, until tender and caramelized at the edges.
05 - Transfer to a serving dish and sprinkle with chopped pecans and parsley if desired. Serve warm.