01 - Preheat oven to 400°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss the sweet potato cubes with olive oil, cinnamon, nutmeg, salt, and pepper until evenly coated.
03 - Spread sweet potatoes in a single layer on the prepared baking sheet.
04 - Roast for 20 minutes, then gently toss and scatter the pecan halves over the potatoes.
05 - Drizzle maple syrup evenly over the mixture.
06 - Return to the oven and roast for an additional 10 minutes, or until sweet potatoes are tender and lightly caramelized and pecans are toasted.
07 - Serve warm, garnished with extra pecans if desired.