If you have a yearning for a really good porchetta, can't find a whole pig, and aren't on your way to Italy, here's a decent solution. First recognize that you are trying to replicate the architecture of the pig, which means you need good fatty skin on the outside. Easy enough if you buy some good pork belly. Butterfly it so it is opened flat. Then lay down some sausage meat, that's the pink you see here, chopped by hand, and then lay on a wad of pork shoulder. Put more sausage around that, roll on the sides of the pork belly - and be sure to use some skin to cap the ends too, then just tie the whole thing up. Roast slowly over a wood fire for about 2-3 hours. Let cool. Slice. It went beautifully with a green sauce of pounded parsley, roasted garlic, salt and lemon juice. In Italy you buy this from a truck, on bread. Un Believe Able.