Sunchoke/Jerusalem Artichoke

Anything you would do with a potato, you can do with a sunchoke. Plus, you can slice them thin and eat them raw.
They have an almost nutty flavor and are naturally high in inulin, a prebiotic fiber.
Roast them, mash them, fry them, or eat them raw.
Superior to the potato in every way. 
Note: The skin has a lot of the nutrients, so scrub it well but don't peel it.