Grilled Pork Waterfall Salad (Nam Tok Moo, น้ำตกหมู)

No sugar. That's the rule. If you put sugar in nam tok, you've crossed out of Isan and into Central Thai territory. The absence of sweet is the principle that defines this entire regional tradition. Ajarn always said: understanding what a cuisine leaves out tells you as much as what it puts in. Isan leaves out sugar. Remember that.

Nam tok is larb's first cousin. Same dressing architecture: nam pla (fish sauce) for salt, manao (lime) for sour, prik pon (roasted dried chili) for heat, khao khua (toasted sticky rice powder) for that smoky, nutty crunch that ties the whole thing together. Same raw shallots, same torn mint, same room-temperature service with sticky rice. The difference is the protein preparation. Larb chops. Nam tok grills, then slices. And that grilling changes everything.

The name means "waterfall." Grill a thick piece of pork neck over charcoal, slice it against the grain while it's still warm, and watch the juices run down the cutting board. That's the waterfall. Those juices carry fat, smoke, and meat flavor directly into the dressing. This is why you dress the meat warm. Cold pork seals shut. Warm pork is open, porous, ready to absorb lime and fish sauce into every fiber. The temperature of the meat at the moment of dressing is the technique that separates a good nam tok from a great one.

Pork neck (kor moo, คอหมู) is the cut. Not tenderloin, not loin, not shoulder. Neck. It has the right ratio of fat to meat, the marbling that keeps it juicy over high heat. Every grilled pork vendor in Isan knows this. The cut is part of the principle. You don't substitute it any more than you'd substitute the fish sauce.