Get a 1 kg piece of fresh pork belly with the rind still on ... Peel 2 fairly large onions and cut them in half. Lay the onions, cut side down, in a baking dish. They will form a trivet and keep the pork from touching the hot dish. Score the pork skin with a very sharp knife at about 1 cm intervals lengthways and rub with a little olive oil and sprinkle with salt. Place the pork on the onions, add a little water to the bottom of the dish, and bake at 160°C for 2 - 3 hours.
Check it every so often. The alchemy that happens involves the pork skin slowly crisping to a magnificently crunchy crackling, and the fat from the layers dissolving out, not only basting the pork constantly, but basting the slowly caramelising onions underneath.
Add more water to the dish in small amounts so the juices that run out don’t scorch. Never baste the top of the crackling, just keep adding water to the baking dish.
At the end of the cooking time, remove the pork and let it rest, remove the onions and take the rendered fat off the top of the juices (you can scrape the dish and make a jus with these juices by adding wine and water and reducing them down further).
Cut the crackling off the pork ready to snap into deafeningly crispy shards of crunchy delight, and cut the pork against the grain into serving pieces which will be meltingly juicy. Serve with your favourite winter veggies, or make a scallop’s day and sear it and chuck it on top.
spread your arms, hold your breath and always trust your cape.....