I usually go with:
2 pound beef chuck roast
1 can cream of mushroom soup
1 onion (diced)
6 carrots (sliced)
6 potatoes (cubed into small pieces)
Directions:
Place onion, carrots and potatoes at bottom of crock pot. Dredge roast in flour and placed in lightly greased pan. Brown on both sides in hot oil over high heat. Place roast in crock pot over vegetables. Mix soup and 1/2 can water then pour over roast. Cover and cook on low for approximately 10 hours, or 5 to 6 hours on high.
Pull the roast & veggies then thicken the soup/juice for gravy. Alternately, I occasionally make the taters seperately ( Mashed ) and serve with biscuits and the aforementioned gravy.