I used to peel a large potatoe, then thinly slice them on a special kitchen implement called a 'mandoline' - you can use this to get the slices as thin or as thick as you prefer, then pat the potato slices dry on a tea towel, place them into a freezer bag and sprinkle in salt, pepper, paprika, cayenne pepper, any dry flavouring powder you like - seal the bag and give it a good shake - then oil a large baking tray and spread the potato slices evenly over the tray and bake in hot oven for at least 5 mins or until golden depending on oven temp settings/fan assisted etc. They taste lovely!