01 - Preheat the 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, maple syrup, cinnamon, salt, and pepper until evenly coated.
03 - Spread the sweet potatoes in a single layer on the prepared baking sheet.
04 - Roast for 25 minutes, stirring halfway through.
05 - Scatter the chopped pecans over the sweet potatoes and roast for an additional 8–10 minutes, until the potatoes are tender and the pecans are toasted.
06 - Remove from the oven and transfer to a serving platter. Garnish with fresh parsley, if desired. Serve warm.