This is, admittedly, a shot in the dark.
Has anyone seen asiento in San Diego. Asiento (from the Spanish verb asentar, meaning to settle) is the dregs in the bottom of the pot when you’re done cooking carnitas, kind of like all the little crumbs in the bottom of the pan after you’ve cooked bacon.
I have a tamale recipe I want to make that calls for a half pound of “chales”, which is just another name for asiento.
If you’ve seen it, please let me know where.