I'm in a recipe sharing mood today I guess....
4-5 lb oven roast
1 packet onion soup mix
1 can jellied cranberry sauce
Pour the soup mix into the crock pot. Trim some of the fat off the roast and lay it on top of the soup mix. Spoon the cranberry sauce over the top of the roast. Mightily resist the urge to add water to the crock pot. Cook on low for 10-12 hours (depending on size of roast.) The cooking juices can be thickened for a delicious gravy.