Ong Pu Na or Grilled Seasoned Crab Fat is a delicious local menu from the North that is hard to find and is only available during the end of the rainy season and the beginning of the winter season. It has now been developed to be eaten all year round with a closed-system crab farm that pays attention to details from the birth of the crab larvae to the processing with standard technology. It can be stored for a year . Source: Thai News Agency