Khai paen
Along the Mekong and Nam Khan below Luang Prabang, women gather silky green river weed in the dry months, when the water runs low and clear, then press it into thin sheets and dry them in the sun. Those sheets turn up everywhere in town, stacked at the morning market and the night market, and a plate of fried khai paen is a favourite nibble with sticky rice and a pot of jeow bong in the late afternoon. Frying takes seconds: the sheets puff, darken and turn shatteringly crisp, tasting of the river, toasted sesame and garlic, a little like nori but earthier. Buy the sheets dried; outside Laos, look in Southeast Asian grocers, and if you can't find them, nori sheets make a stand-in, though they are thinner, sea-salty rather than freshwater and fry even faster. Leaving a sheet in the oil a moment too long is the classic error, as it goes bitter and brown almost instantly. Chef's tip: cut the sheets into squares with scissors before frying, not after, so they don't crumble into dust.
























