I learned to do this last week in class it is a method called "en papillote" En papillote puts dinner in the bag simply said...En papillote (in PAP'-e-oht) is a simple French technique easy to master. It calls for wrapping food in parchment paper and briefly baking.
Parchment paper,seals in moisture and prevents flavorful cooking juices from running out.This cooking method is also fast and healthful. Food cooks in about 15 minutes and requires little or no added fat.