I've been inspired to resurrect this blog with the arrival of Jerusalem Artichokes in my veg bag. They are not artichokes and not from Jerusalem but they are delicious and good for you. These ones were relatively smooth, sometimes Jerusalem Artichokes can be very knobbly.
Some people are put off using them because they think they are going to be a lot of bother to peel. Well don't peel them! We soaked these in water for half an hour to get the worst of the mud off and then boiled them in their skins. We served them (still in their skins) with a cheese sauce and chicken casserole. the BBC food website has a section on using Jerusalem Artichokes.
Jerusalem Artichokes are supposed to give you wind but I have to say I didn't notice any ill effects!