Grab some type of beef roast (I usually get either chuck or round), and two cans of Campbell's french onion soup. Throw it in the crock pot on low over night (about 7-9 hours should do it) and you have delicious tender roast beef and gravy that will feed one person for 3-4 days, all for 5 minutes of prep.

Throw in some veggies if you like (pearl onions are really good, and I personally like mushrooms in there as well as they pair well with meat and soak up the gravy/soup mixture). It also goes without saying that if you can make your own french onion soup, it would turn out even better, but that does away with the whole 5 mins of prep stipulation. :)

If you want to get really fancy, look up a Brazilian dish called feijoada. Most recipies call for it to be cooked in a pot or a pressure cooker, but I convinced my girlfriend (who is from Brasil) to try to cook it in a crock pot, and it turned out being one of the best things I have ever put in my mouth. It's a real bitch getting all of the stuff to make it, but it is utterly fantastic and definitely worth the effort.

I doubt it would win any BBQ competitions, but it's dead easy to make and is pretty delicious. We don't bother making the pancakes that the website recommends; we just grab some rolls from a bakery.

We don't make nearly as much use of our slow cooker as we should, but we're definitely looking for more recipes too. As we move into winter, we'll probably start trying to make stew, etc in it.