what ever you do dont cook it that long

ok this is a nice way to cook it also doesn't need to go in a oven bag if you dont want I dont use them except they keep oven clean

allow at least 20min per 500grms + a extra 20 mon over

cook in a hot oven for 10 min 230c then drop it down to 180c for the remander of time, if it is a large peice of meat it may require a little longer, you can piece the meat and if the juice is clear its cooked, also lamb is cooked when its starts to come away from the bone