01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss the cubed butternut squash with maple syrup, olive oil, cinnamon, sea salt, and black pepper until evenly coated.
03 - Spread the coated squash in a single layer on the prepared baking sheet.
04 - Roast for 25 to 30 minutes, turning once halfway through, until the squash is tender and golden at the edges.
05 - Remove from the oven and, if desired, sprinkle with chopped pecans or walnuts and fresh parsley before serving.