In the culinary arts, the term en papillote (pronounced "ON poppy-YOTE") refers to a moist-heat cooking method where the food is enclosed in a packet of parchment paper or foil and then cooked in the oven.
When cooking en papillote, there are usually some vegetables, herbs and seasonings included in the packet along with the main item. These additional ingredients, along with the main item, give off steam, which is what actually cooks the food. Therefore, en papillote cooking is basically a technique for cooking with steam.
Because it is delicate and cooks quickly, fish is a good choice for cooking in this way. Salmon en papillote is a popular dish.
When serving a recipe prepared en papillote, it is traditional to present the dish by slicing open the paper in front of the guest.
En papillote means "in paper" in French.