Buro is the Filipino word for "pickled" or "fermented". Just putting the food which is to be pickled/fermented in water with salt, as in Burong Talangka (Pickled/Fermented small river crabs), Burong Kamias (Pickled/Fermented Kamias) and Burong Mustasa (Pickled/Fermented Mustard Leaves). In Ilocos, Karmay is also prepared this way, they just put fresh Karmay in water with salt and it is ready to eat some hours. The last time I ate Burong Karmay was in Vigan Ilocos Sur, nar their beautiful church, there was a small wooden cart selling them from a big glass jar with salted water and filled with green Karmay.