Ok - so here's the part where I admit to be a negelectful wife and confessing to the fact that I have never cooked DH a proper roast before . I can do beautiful roasted veggies etc but when it comes to the meat part, I normally cheat and get a roast chook from the chicken shop or one of those rolled marinated roasts. After watching him practically lick the plate after a roast at a friends house recently, I have decided to be domestic goddess and Jamie Oliver rolled into one and cook the hard working boy a roast! Only problem - how long do I cook it for and what temp ?? It is a half leg lamb - 1.2kg. I am so clueless its not funny.