They say curiosity kills the cat, and I certainly do get my share of curious students, who wish to know how just about every bottled sauce from across the Pacific is made, including fish sauce.
In case you are not yet familiar with fish sauce, it is that salty, smelly brown liquid made from fish that is the single, most important flavoring ingredient in Thai cooking (also well-loved in Laos, Cambodia, Vietnam, Burma and the Philippines). Used like salt in western cooking and soy sauce in Chinese cooking, good-quality fish sauce imparts a distinct aroma and flavor all its own. It is indispensable in the Thai kitchen as Thai food wouldn't be quite the same without it.