You can spray them with oil and put them in the oven at about 400 - preferably on a rack over a pan, so they will brown on all sides. If you bake them flat in a pan, they will be soggy on one side and crisp on the other.
I would just pan fry them in a few tablespoons of oil. If it's hot enough, they won't absorb a lot. The oil should be just shy of the smoke point.