2kg/4lb 6oz King Edward potatoes, peeled and thinly sliced
2 garlic cloves, cut in half
2 onions, roughly chopped
1 large bunch sage leaves, finely sliced
sea salt and freshly ground black pepper
300g/10陆oz fresh white breadcrumbs
400g/14oz cooked chestnuts, roughly chopped
pinch of freshly grated nutmeg
75驳/2陆辞锄 butter
600ml/21fl oz double cream
600ml/21fl oz full-fat milk
5.5kg/12lb boneless loin of pork with the belly attached