Peel butternut squash, discard seeds and cut into 2 inch cubes. Place in a mixing bowl.
Add olive oil, sugar, garlic, cinnamon, a pinch of salt and pepper to the mixing bowl and toss until all spices are evenly distributed onto the squash cubes.
Spray a large baking dish with non-stick cooking spray. Transfer the seasoned butternut squash into the baking dish and arrange in a single layer.
Place the baking dish on the lower rack of your oven and bake for 25-30 minutes or until the squash is tender.