This crockpot recipe is tried and true. It was initially made with brisket meat, but now I buy whatever roasting meat happens to be on sale. You can add root veggies (rutabega, carrot, potatoes) and play around with the lipton soup packets.
-5lbs of roasting meat of your choice (brisket, boston butt, etc)
-1 package of lipton onion soup mix (I use beef & mushroom)
-1 can of sliced mushrooms; undrained
(optional: potatoes, carrots, rutabega)
Lay meat fat side up in crock pot
Mix soup mix with the can of undrained slice mushrooms, pour mixture over meat
Cook over low heat 8 hours or until fork tender