Rinse thoroughly, trim both ends.
Cut in half lengthwise, scoop out the seeds.
Slice into ½-inch thick half-moons.
Toss squash slices with olive oil, garlic powder, salt, pepper, and optional maple syrup or brown sugar.
Spread squash evenly on the prepared baking sheet, making sure pieces don’t overlap.
Roast for 20–25 minutes, flipping halfway through, until tender and golden brown.
Add crispy onions over the squash in the final 5 minutes of roasting so they heat and crisp up without burning.
Optional: Broil for 1–2 minutes at the end for extra caramelization.
Serve hot, garnished with fresh herbs or parmesan, if desired.