Au jus the cook may simply 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 flavor may suffer after this time. American recipes "au jus" often use soy sauce, Worcestershire sauce, salt, pepper, white or brown sugar, garlic, beets, carrots, onion, or other ingredients to make something more like a gravy. 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
Genovese sauce nor with Salsa Genovese, a red wine and vegetable condiment for fish, nor with the "sauce génevoise" from Lake Geneva, again served with fish. Genovese sauce is prepared by sautéing either beef, veal or pork in a large number of onions, for at least two but as many as ten hours. The onions are typically accompanied by minced carrots and celery in what is sometimes known as a "mirepoix," and the sauce may be additionally seasoned using garlic, marjoram, and either bacon, prosciutto or lard. The slow cooking of the onions is especially important for the sauce's flavor, and is