Place potatoes in a bowl.
Add the oil, salt, pepper and any seasoning you want (such as paprika, garlic, rosemary, lemon).
Line a baking tray with baking parchment.
Lightly spray the baking parchment with cooking spray to prevent sticking.
Place potatoes on a baking tray.
Bake for about 30 to 40 minutes turning them around once or twice as needed, until golden brown and crisp.
I usually turn them over around 20 mins and keep a close watch over them towards the end because different ovens cook at different timings.
Mine took about 35 minutes.