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 until the zucchini is well coated.

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 15-20 minutes or until the zucchini is tender and the cheese is golden brown.

Remove from the oven and let cool slightly before serving.