If you like sour Kraut, one of our favorite pork crock pot meals is a pork shoulder roast cooked with a large jar of sour kraut poured over it. add a diced onion and about a cup of water. cook on low for 6 hours or so. the acid in the kraut tenderizes the pork and the pork mellows out the kraut so it's not so sharp. serve with mashed potatoes.