Preheat the oven to 400°F / 200°C. Line a baking sheet with parchment paper.

Cut slits in the potatoes, about ⅛ inch apart, but don’t cut all the way through. It may be helpful to lay a chopstick or wooden spoon handle on either side of the potato, then cut the slits so the knife can’t go all the way through.

Place the potatoes in a single layer on the baking sheet. Drizzle or spray with olive oil and season with salt and pepper. Place into the oven and bake for 30 - 45 minutes or until cooked through and slightly crispy. The time will depend on the size of your potatoes.

If desired, sprinkle grated Parmesan cheese over the potatoes during the last 5-10 minutes of baking. This will add a delicious cheesy flavor and golden crust to the potatoes.

Place the seasoned potatoes in the air fryer basket in a single layer, ensuring they are not overcrowded.

Air fry the potatoes for 20-25 minutes, shaking the basket halfway through the cooking time to ensure even cooking.

The potatoes are done when they are tender on the inside and crispy and golden brown on the outside. Adjust the cooking time as needed based on the size and thickness of the potatoes.