This was an experiment I did for Easter this year and it turned out very well. I bought the lamb already off the bone and cut it myself before stuffing. But you can ask your butcher to do this for you,he will even cut it ready for stuffing and rolling to make it easier. I made 2 stuffed pork loins as well to serve 10 of us, my lamb was 1.1kg in weight I think it would serve 4-6 people if not making with other meats, along with sides. Just so you know the way I cut my lamb I will explain this here. Mine was already looking like a mini log, I turned it over so it was skin side down on my chopping board. I cut the lamb down the center, leaving about a half inch of meat uncut. I then cut through each half, cutting through the center of each, again not going all the way through. Then I opened it out and pounded it with a meat mallet to even out thickness before spreading stuffing over and rolling back up before securing with kitchen string.