For a whole pork belly, take a leaf out of the Italians’ book: slather the belly with herbs, roll it up and tie it tightly, then roast in a low oven overnight (look for a recipe for porchetta).
This is an easy pork belly dish where all the work, which isn’t much frankly, happens the day before. Slow cooking the pork belly transforms quite a cheap piece of meat into a tender treat.