It never occurred to me before, but it makes sense: if you can roast a chicken in a clay oven, such as a tandoor, why not just wrap the bird in clay and stick it in the oven? Tasteologie has a video and pictures of chefs showing you how it's done.
Link | Photo: Tasteologie
He told me that rat baked in clay, in the embers of a fire, was a delicacy. An added advantage of baking in clay was that plucking or skinning wasn't necessary, the skin peels off with the clay.
@Sunfall We tried the salt crust as well! The clay cooked the chicken a little more evenly.
@Lady C I'll have to try it with an un-plucked bird one day!