Love this question since it's different answers every day. I also wanted to say that I really appreciated feedback on the beef stew question a week or two ago. I took suggestions from there and made the most awesome made-up beef soup (not quite stew) last night from the contents of my fridge. I pureed the leftover vegetables from this recipe: http://www.tastefoodblog.com/tastefood/2010/09/sriracha-marinated-roast-chicken-with-root-vegetables-and-couscous.html and added a quart of beef stock, 1/2 lb browned ground beef, can of tomatoes, 2 cups dried/soaked pinto beans and a handful of pureed caramelized onions (made from Kenji's technique - my husband and I were singing the In-N-Out song the whole time they were cooking!). Left it in the crock pot all day and came home to the most wonderful, satisfying soup. Added celery and carrots at the end to make it extra pretty.
So my dinner tonight is soup leftovers with drop biscuits. What about yours?