Jerusalem artichokes are popular for soup as they have a tendency to collapse when cooked. Their sweet chestnutty flavor also makes them good partners for salty foods such as ham or smoked fish. You could also lightly poach some slices of Jerusalem artichoke and use them in salads, or try mashing them with potato to serve as an accompanying vegetable with any meal where the mash is a starring partner, or as a topping for meat or fish pies.