Mix rosemary, zest of citrus, ancho chilli powder, cumin, pepper, cayenne and salt in a small bowl. Pat lamb dry and rub all over with spice mixture, then allow it to cure for at least 1 hour out of the fridge until it reaches room temperature.
Mix rosemary, zest of citrus, ancho chilli powder, cumin, pepper, cayenne and salt in a small bowl. Pat lamb dry and rub all over with spice mixture, then allow it to cure for at least 1 hour out of the fridge until it reaches room temperature.