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
Tomato sauce sauce is used in the same way as American ketchup. "Tomato sauce" may also be used in its generic English meaning of a sauce primarily based on tomatoes, as in a menu item "Gnocchi in a tomato sauce" where it would be understood that the sauce would be of the kind used in Italian cooking for pastas. In the U.S., "tomato sauce" refers to two distinct sauces. One is a tomato concentrate with salt and minimal herbs, used in cooking. This product is considered incomplete and not normally used as is. Related ingredients are tomato purée and tomato paste, each