I have had really good success with this pot roast - basically just the can of mushroom soup and the onion soup mix is all you need besides the pot roast itself. You can sear the pot roast first, or just put everything together into the crock pot and leave it overnight. The longer the better, but pretty much 8 or 9 hours is pretty good. The mushroom soup, onion soup mix, and the juices from the beef make a very delicious gravy as well. Add some veggies after, so they don't get mushy. It's basically this recipe below:
http://www.campbellskitchen.com/reci...ot-roast-27270