Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup.
Wash the small potatoes thoroughly and slice them into ¼-inch thick rounds.
In a mixing bowl, combine the olive oil, garlic powder, dried oregano, salt, and black pepper. Mix well.
Add the potato rounds to the bowl and toss them with the oil and seasoning mixture until they are evenly coated.
Arrange the coated potato rounds in a single layer on the prepared baking sheet.
Sprinkle the grated Parmesan cheese evenly over the potato rounds.
Bake in the preheated oven for 20-25 minutes or until the potatoes are tender and the cheese is golden and crispy.
Once baked, remove from the oven and let them cool for a few minutes. Garnish with fresh parsley if desired and serve hot.
For extra flavor, you can experiment with different herbs like thyme or rosemary.
These potato rounds can be served with a side of sour cream or your favorite dipping sauce.