01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss pumpkin cubes with olive oil, sea salt, black pepper, dried herbs, and cinnamon until evenly coated.
03 - Spread pumpkin in a single layer on the prepared baking sheet, spacing pieces to avoid crowding.
04 - Roast for 25 to 30 minutes, turning once halfway through, until edges are caramelized and pumpkin is fork-tender.
05 - Transfer to a serving platter. Garnish with fresh parsley and toasted pumpkin seeds if desired. Serve warm.