I make "Tom kem Moo" once in a while. I usually use only the feet section of the pig to make this soup (you can use other parts too). It's one of the easiest soup to make. Slightly brown the sugar, add the meat and stir, add water, salt, clove of garlic,msg, galanga, chinese 5 spice powder, add more sugar if needed to give it the sweetness, add dark soy sauce let it come to a boil...Then add in boiled chicken eggs or quail eggs...let it boil until it's done.
Making sweet dark poached chicken or "gai ung" is similar to this. We make the same broth using same exact ingredient drop the whole chicken in there darken it up until fully cooked and then discard the juice. Eat it with "jeo".
There are so many recipe from the north, central, and southern parts of Laos. "Tom kem moo" is still very popular in Laos and also among Thai Issan.