Fish Sauce, the amber-colored umami Uzzi of Southeast Asian cuisine. (source)
I assume it is a proper name. Google appears to suggest Uzzi is a biblical name, but nothing beyond it. What does it refer to here?
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The simile, intended to be instantly comprehended, would, perhaps, have been more effective if the writer had spelled 'Uzi' correctly. It is the name of a small machine-gun developed in Israel. Notably powerful and capable of devastating results. It fires bullets so rapidly that a burst can cut a man in two. Strong, disruptive, effective, devastating if correctly handled, dangerous if not, etc. An Uzi is small but effective, and a small amount of SE Asian fish sauce can powerfully influence the flavour of a dish.