Preheat the oven to 400°F (200°C).

In a mixing bowl, combine the sliced zucchini, olive oil, garlic powder, oregano, salt, and pepper. Toss to coat evenly.

Spread the zucchini mixture in a single layer on a baking sheet.

Sprinkle the grated Parmesan cheese evenly over the zucchini.

Bake in the preheated oven for 20 minutes, or until the zucchini is tender and the cheese is golden brown.

Remove from the oven and let cool slightly before serving.