Mix the salt and water until it resembles slushy snow. Add chopped rosemary if you wish. (Mel Melcon / Los Angeles Times)
Sear the pork so that its well- browned. Put it and the potatoes on a layer of moistened salt. (Mel Melcon / Los Angeles Times)
Cover everything with more salt, and roast until the meat is done and the potatoes are tender. (Mel Melcon / Los Angeles Times)
Crack the salt crust with a knife and lift it off. Brush away any salt still clinging to the meat. (Mel Melcon / Los Angeles Times)