wrap hind leg in foil and smear in butter and pepper it chop up two onions and place on it and around it and seal .cook in pre heated oven and turn down to 150 on a electric oven for 3. 1/2hrs turning every hr and last half hour take out of foil and pour juices in tray and onions leave for the last 1/2hr in oven ,lovely use gaslic if you like it. if in doubt i,ll have it .