I've tried the McCain chips (and a couple of other brands) as uk1 had recommended them but do not bother anymore, McDonalds Fries are not what I am seeking to replicate. My husband was not impressed by the shortcut either.
If I want to make chips in a hurry we'd rather have those white fleshed purple skinned sweet potatoes.

Baby new potatoes are easy to do also, or you can approximate a tapas classic (papas arruga's) by par boiling small potatoes in water with an excessive amount of salt in it and then air frying until the skins wrinkle (name in Spanish is wrinkled potatoes). Aim is to cook the potatoes with a crust of salt on the skins.
http://en.m.wikipedia.org/wiki/Canar...inkly_potatoes
No oil used at all for this method.