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
Tomato sauce purée or fresh tomatoes, roux, garlic, salt, sugar, and pepper. Many times, butter and flour will be listed in the ingredients, but those are only used to make the roux (thickening agent). The most common use of the term tomato sauce in New Zealand and South Africa is to describe a popular, commercially produced condiment that is a type of table sauce, similar to American ketchup but without vinegar, which is typically applied to foods such as meat pies, sausages, other cooked meat (in particular steak), and fish and chips. Tomato-based sauces served with pasta would commonly be referred to