Thanks to all for such speedy suggestions - in time for the weekend and in case I get more sunchokes in this week's basket!

I haven't yet made this, but it's on my to-do list. Sounds divine to me, maybe it'll also strike your fancy.
http://www.epicurious.com/recipes/food/views/Celery-Root-and-Potato-Puree-with-Roasted-Jerusalem-Artichoke-Croutons-361250

I made a modified version of this soup (sans bacon since I didn't have any, so I used the veggie suggestion, and no chives either since I was missing that as well, and adjusted the proportion of potatoes to artichokes based on what I had) , and it was delicious.

http://chocolateandzucchini.com/archives/2009/10/jerusalem_artichoke_soup_with_bacon.php

Hi! Someone else asked a similar question a few days ago. Take a peek, there are some good suggestions, including mine :)

http://www.food52.com/foodpickle/3332-sunchokes-or-jerusalem-art