Use a fruitwood to preheat the smoker from about 225°F to 250°F.
Smear the lamb with olive oil.
Rub the smeared roast with your choice of seasonings and spices.
Slide your rubbed roast and leave to roast at low heat.
You can leave your roast for either 2 hours or until the temperature falls to 120°F.
After two hours or when the temperature has dropped to 120°F, increase the heat to 400°F and leave to continue roasting for about 20 more minutes.
Remove the lamb from the smoker, place it in foil paper and allow it to sit for another 20 minutes so that the roast can absorb the juice from the rub very well.