Jerusalem artichokes are sweet and almost garlicky and mushroomy and gorgeous. Although called artichokes they’re actually tubers – like rough and ready potatoes. You can scrub and roast them whole like mini jacket potatoes and split them open, drizzled with a little chilli oil. You can even use them in a salad with smoky bacon. A Jerusalem artichoke’s best friends are sage, thyme, butter, bacon, bay, cream, breadcrumbs, cheese and anything smoked.
(by Jamie Oliver)

For a delicious  Soup try:
Jerusalem Artichoke Soup with Gruyere Toasts