Many recipes for som tam call for dried shrimp.
I've seen a number of brands from various countries of dried shrimp in the freezer section at the market. Almost all of the labels on the packages included warnings that the shrimp had to be fully cleaned and cooked before consuming. However, the brand I most recently bought does not have this warning.
Do you routinely cook your dried shrimp before using for som tam? What cooking method do you use?
Or do you use a brand that is precooked?