Packet cooking has several advantages. If you’re a family, it’s fun to let everyone choose and assemble their own packages. Enclosing food in parchment or foil pouches allows for steaming, a particularly efficient cooking method and gentle enough for delicate proteins, especially fish. Because the steam is so intense and cooks the outside of food so quickly, it’s best to stick with smaller cuts and pieces of vegetables. Sealed environment traps moisture – no dry food here! – and allows you to infuse the ingredients with a variety of flavors, especially wine and herbs. And, of course, cleanup, whether you put the pouches in the oven or on the grill, is minimal when everything is on its own. There is also the dramatic revelation, when every diner can open its package and be greeted with a breath of aromatic vapor.