Finely chop gingr,garlic,coriandr roots,bown all on sauce pan on medium heat until fragrance,add sliced shallots,chopped fresh hot chili,stir until all soft

Lower heat ,add palm sugar,brown sugar,tamarind puree,seasoning with fishsauce,soya sauce,oystr sauce ,sesame oil,add water,stir to mix

Simmer it until water reduce ,color will change to a bit darker,shinny,if its too thick add more water to your preference consistency,i like it thickness