Au jus

Au jus is a French culinary term meaning "with juice". It refers to meat dishes prepared or served together with a light broth or gravy, made from the fluids secreted by the meat as it is cooked. In French cuisine, cooking au jus is a natural way to enhance the flavour of dishes, mainly chicken, veal, and lamb. In American cuisine, the term is sometimes used to refer to a light sauce for beef recipes, which may be served with the food or placed on the side for dipping. To prepare a natural jus, the cook may skim off the fat from the juices left after cooking and bring the remaining meat stock and water to a boil. Jus can be frozen for six months or longer, but the flavour may suffer after this time. Au jus recipes in the United States often use soy sauce, Worcestershire sauce, salt, pepper, white or brown sugar, garlic, beets, carrots, onions, or other ingredients to make something more like a gravy.[citation needed] The American jus is sometimes prepared separately, rather than being produced naturally by the food being cooked. An example could be a beef jus made by reducing beef stock to a concentrated form (also known as Glace de Viande) to accompany a meat dish. It is typically served with the French dip sandwich.[citation needed]

Source: Wikipedia