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
Bolognese sauce and the sauce may be laid on top of the spaghetti (rather than being mixed in, in the Italian manner) or even served separately from it (leaving diners to mix it in themselves). It is often served with grated parmesan on top, but local cheeses, such as grated cheddar are also often used. The sauce is commonly referred to as "Bolognese sauce" or just "spaghetti sauce", but is actually closer to a Southern or Central Italian style of pasta dish, as true Bolognese sauce is generally served in Italy with tagliatelle ribbons, and not with spaghetti. Although so-called "spaghetti bolognese"