Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it.

Wash and dry the zucchinis, then slice them into 1/4-inch thick rounds.

In a large mixing bowl, combine olive oil, minced garlic, oregano, salt, and pepper. Stir until well mixed.

Add the zucchini slices to the bowl and toss until all pieces are evenly coated with the garlic and olive oil mixture.

Arrange the zucchini slices in a single layer on the prepared baking sheet.

Sprinkle the grated Parmesan cheese evenly over the zucchini slices.

Bake in the preheated oven for 15-20 minutes, or until the zucchini becomes tender and the Parmesan cheese is golden and slightly crispy.

Remove from the oven and allow to cool for a few minutes. Garnish with fresh parsley if desired and serve warm.