>> the most important ingredient in som tam is papaya. but only green papaya -only those are crisp enough. >> you also need cherry tomatos, a lot of chili which combines well with the strips of papaya, garlic and various fermented fish sauces that are all homemade. then, a bit of palm sugar and, of course, fresh crab. finally, the ingredients are ground up in a mortar and mixed together. sampron chuanchit has been running this stand in a busy area of bangkok for 4 years. her recipe for success? >> my food just tastes great. otherwise i wouldn't have so many customers. >> one serving of som tam costs 30 baht's, or around 75 euro cents. you can buy it to go -- but most people who work in offices nearby prefer to hang out in sampron's shop. they share fish and chat. it's the kind of food that you grow up with. so you don't really get bored of it. this is the real way the sam tam tastes. and it's cheap and it's good." >>do you also eat it because there are vitamins in it and stuff like that? >> no we don't really care. we like it because it's