
Preheat oven to 400°F.
Trim the top and bottom from the butternut squash, then peel with a vegetable peeler to remove the skin. Cut the squash in half lengthwise and scoop out the seeds and soft flesh using a spoon. Cut into 1-inch cubes.
Transfer cubes to a large bowl, drizzle with olive oil and sprinkle with salt, garlic powder, and pepper. Toss well so the pieces are evenly coated.
Spread out onto a large baking sheet so the pieces are not touching each other.
Bake for 15 minutes then stir and continue baking until tender and caramelized, 10 to 15 minutes more. Sprinkle with more salt and pepper to taste, and serve immediately.