very interesting! what you've described reminds me of a way of cooking chicken in China. We call the chicken cooked in this way "Jiao Hua Ji", which means "chicken of beggars". Usually it's wrapped in the mud( and the dried mud could form a kind of shell) , and in a pit with burning charcoals/branches under and over it and covered with soil/dust. It's a very, "grassroot", way of cooking chicken...As far as I know, shawnee is right. During the Ottoman rule, kleftes were groups of outlaws that, among other things, defied the Ottoman authorities -both central and local. Living in hiding in the country, they had to prepare their meals without being spotted by the smoke of open fires. Therefore they had to cook [broil? bake? grill? -I do not know what verb applies here] their meat, usually lamb, wrapped in the skin (or unskinned altogether?) in a pit with burning charcoals/branches under and over it and covered with soil/dust.