1. Set the oven at 375 degrees. Line a 9-by-13-inch baking dish, or another dish about the same size, with parchment paper. Have on hand another piece of parchment large enough to cover the dish. 2.
Fish en papillote, or “fish in parchment,” is one of those dishes that feels fancy but couldn’t be easier to prepare. The technique—steaming fish and vegetables in a sealed packet of parchment ...