Just learned that a few weeks ago. On FR...
If you add a bit of nam pla (aka VN nuoc mam) to any italian sauce, or to dishes like beef chile, stews, chicken soup, etc., you will have found the "something" that's been missing for all this time. It's incredible how two tbsp. will make such a big and dramatic difference in so many dishes.
I'll have to try that!
dammit! I drooling again.