The lamb is splayed open on a wooden or metal stake and planted at an angle around an open wood fire for hours, slow-roasting from radiant heat rather than direct flame.
A whole lamb is butterflied, skewered on a stake, and roasted upright beside an open fire until the skin crisps and the meat pulls easily from the bone. Vendors at Patagonian festivals and roadside stands carve it to order onto a plate or bread.