I love peanut sauce, I have no idea if authentic Thai food uses it or not but I love it. I want to try Thai tacos but I haven't found a recipe that is quite what I am looking for so here is what I think will fulfill my needs. It is somewhat inspired by California Pizza Kitchens Thai pizza.
½ Cup smooth peanut butter ¼ Cup soy sauce 2 Tablespoons brown sugar 1 Tablespoon rice vinegar 1 teaspoon crushed red pepper flakes 1 Cup hot water
Place garlic and ginger in food processor until well chopped. Add peanut butter, soy sauce, brown sugar, vinegar and red pepper flakes. Pulse until well combined and slowly add hot water until sauce is the consistency you like.