If the Chinese have Bok Choy in Oyster Sauce and the Malaysians have Kailan with Oyster Sauce or Kangkung Belachan, then the Filipinos have this dish Kangkong with Bagoong . Now if you are wondering what Kangkong is? It is a tropical leafy vegetable that is also called Water Spinach, Swamp Cabbage, Water Morning Glory or sometimes