I make them in the oven-secret is to slice them really thinly- I just wipe the oven tray with oil then wipe the slices over back and front, sprinkle with salt, and bake along with the rest of the Sunday dinner. I love the dark brown chewy edges!
The turnip was a nice white variety (no name-seeds from WORKS) and I dug them up in the summer when they were small and tender. I don't really like turnip, but I love the crisps!