Ok, when I was young we knew a family from Laos (Mienh), who had also spent some time living in Thailand before moving to the US. The food was divine, but back then I wasn't too into things hot, so never paid attention when Koy was making this paste. All I remember was her roasting small chilies (fresh) in the oven and then turning them into a paste with unknown ingredients. It was generally served in a tiny dish and the adults could be seen dipping their sticky rice into it. I have no idea if it's Laos or Thailand that this comes from, though I imagine many similarities between the foods... Anyone have ideas?