I used to find a great version of this on trips to Minneapolis/St. Paul.
I always make a version of this for thanksgiving: http://www.williams-sonoma.com/recipe/wild-rice-and-wild-mushroom-soup.html?cm_src=RECIPESEARCH
I alter it a bit (maybe more mushrooms, maybe veal stock, etc.) but it's always delicious.
Thank you--love the addition of mushrooms!