There are many oven fry recipes but this combibation gives a tasty slightly crunchy fry. I do not use any oil on the potatoes but the spices & cheese stick better if you do. I will suggest spraying them in the recipe but it is not necessary. Holding the fries in the ice cold water until baking prevents them from discoloring. I use a Baking stone but a cookie sheet works too. If you wish leave the skin on but scrub them well.