01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - Place sweet potato cubes in a large bowl. Add olive oil, cinnamon, salt, and black pepper. Toss until evenly coated. Add maple syrup and nutmeg if desired.
03 - Spread seasoned sweet potatoes in a single layer on prepared baking sheet, ensuring pieces are not overcrowded for optimal caramelization.
04 - Roast for 25 to 30 minutes, flipping halfway through cooking time. Sweet potatoes are done when golden-brown edges appear and flesh is tender when pierced with a fork.
05 - Transfer roasted sweet potatoes to serving dish. Serve warm, garnished with additional cinnamon if desired.