The next process is for the meat to be brined in a solution made by boiling up four litres of water along with one-point-three-five kilograms of salt, two-hundred grams of brown sugar and thirty grams of curing salts to give it its pink colour. After boiling for twenty minutes let the solution cool and then pop the head in and refrigerate for at least twenty-four hours. Once its brined you need to rinse the head off and boil in a stock made with two onions, herbs, spices and the zest of half a lemon all tied up in a muslin bag. Cook for six hours.