I've just got a Morphy Richards (the large one) The booklet says all food, inclg joints, should be covered in liquid but on searching for recipes etc it seems people are not necessarily doing this and some are using it to cook whole joints without any liquid. The things I have cooked so far have been watery, I am cooking large amounts and I know I can thicken liquid but just thought I'd check what others do. Is it just this cooker that says that?