Cooking en papillote (French for "in parchment") is a method of hand-sealing protein and vegetables in parchment paper, then oven-roasting them. While liquids aren't typically added to the pouch, ingredients seep out their own liquid and effectively steam in their own juices, resulting in a healthy meal that's bound to be filled with both moisture and flavor. In addition, other flavoring agents, like herbs and aromatics, get enveloped in the same steam-filled vessel, amping up the delicious factor.
To create a parchment paper pouch, arrange your ingredients on one half of a large piece of parchment (this method works with aluminum foil, too). Fold the other half on top of your ingredients. Fold up the open edges of the packet in pleats, working from one end to the other. Don't worry too much about how the package looks, as long as it's tightly sealed. When you open your parchment-wrapped meal, you'll find a moist, flavorful, and perfectly cooked meal ready to be plated.
Even though it is most commonly associated with fish and vegetables, other quick-cooking proteins like chicken breast can be cooked the same way. What do you like to cook in parchment?