Som Tum Poo Plara is a variation of Green Papaya Salad that includes fermented fish paste, known as plara, and salted crab. This version of Som Tum is popular in northeastern Thailand and offers a bold and intense flavor. To make Som Tum Poo Plara, follow the steps for the classic version but also add a tablespoon of fermented fish paste and a handful of salted crab. Adjust the ingredients according to your taste preferences. The fermented fish paste and salted crab add a unique umami flavor to the salad. This variation of Som Tum is perfect for those who enjoy bold and savory flavors.