Preheat oven to 400º.
Cut the squash in half, remove the seeds with a spoon, then slice the squash into 1/2 moon shaped pieces.
In a large bowl, combine olive oil and garlic powder.
Toss the squash in oil then lay squash out on a baking sheet. Sprinkle each slice with parmesan cheese and then season with salt and pepper.
Bake for 30 minutes until the squash is tender and the cheese is golden brown.