Preheat the oven to 400°F (200°C).
Prepare the butternut squash by peeling, seeding, and cubing it.
In a large mixing bowl, combine the cubed squash with olive oil, brown sugar, salt, black pepper, and cinnamon.
Line a baking sheet with parchment paper and spread out the squash cubes in a single layer.
Roast the squash in the preheated oven for about 25-30 minutes.
Toss the squash halfway through roasting for even cooking.
Remove from the oven and sprinkle with fresh herbs (if using).
Serve warm, and enjoy the delicious flavors!