Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
Toss the zucchini slices with olive oil, garlic powder, salt, and pepper in a large bowl.
Lay them out on the baking sheet in a single layer, making sure they don't overlap.
Sprinkle a generous pinch of parmesan on each slice.
Bake for 20 minutes or until the cheese is golden and crisp around the edges.
Serve warm, optionally garnished with a sprinkle of fresh parsley.