Oven chips are quick and cheap to make. I prefer to leave the skins on my potatoes, but you can peel them if prefer.
Pre heat the oven to 200 C/ Gas mark 6
Scrub a handful of potatoes (enough to serve for the number of people you are feeding). Chop the potatoes into large chips and place onto a baking tray. Drizzle with olive oil and season well. Use your hands to turn the potatoes over and coat them in oil. Bake the potatoes for 35-40 minutes (until golden brown) turning them after they have been in the oven for 20 minutes.