In a pot with water cook pork butt & onion until tender and easily pulls apart (~4 hours). When nearly done, add garlic, salt & pepper.
De-seed chiles using a spoon and cook in a "lot" of water -- boil for one hour. Blend with a small amount of water, add black pepper and blend again. Strain.
Strang instruction: "In a pot w/oil, put chiles + boil - litl bit; add to meat (save some for masa)"
In a bowl, put masa; add some of the chile for color
Soak husks in water for one hour->wash husks & drain
assemble + steam until cooked
when husks comes away from masa easiy