This a real fingers and all food and at under $3 it's as cheap as lamb gets. Good with a sweet style couscous, minted yoghurt and a plate of flat bread.
Wrap the individual pieces in foil and cook as follows:
Oven:170 degrees C for 30 minutes.
BBQ (with hood, indirect heat): 150 degrees C for 2 hours, turn 1/2 time.
BBQ (plate/grill): lowest heat for 40 minutes, turn 1/2 way.