Fish sauce are made with anchovies, mackerel, scabbard fish and salt. The bigger the fish, the more mercury you might expect, especially if predator fish like scabbard fish. They do not have any additives like sugar, hydrolyzed protein, or preservatives. Vietnamese prefer sauces without a strong smell, and transparent with a deep golden amber color. "First press" fish sauce, meaning the sauce is bottled from the first time the fermenting barrels are drained, also indicates quality. Lastly, when measuring the nitrogen level of fish sauces (N), most fish sauce on the market falls within the mid 20N range. Anything over 30N is
Chaudfroid sauce Chaudfroid sauce Chaudfroid sauce, also spelled as chaud-froid sauce, is a culinary sauce that can be prepared using a reduction of boiled meat carcasses and other ingredients. Simpler preparations of the sauce omit the use of meat, and some use sauces such as espagnole, allemande or velouté as a base. Chaudfroid sauce is typically served cold, atop cold meats and cold meat-based dishes such as galantine and terrine. The term "chaud froid" means "hot-cold" in French. The sauce's name is based upon the sauce being prepared hot, but served cold. It has been suggested that chaudfroid sauce was invented by