Wow, you guy here take terminology too serous when interpreting these
recipes. When I first found this site the Menudo explanations were pretty
funny, as was that Barbocoa means cooking cow head. but
"sweating" peppers is just what the Mexican lady in the link was showing
you. It is not the same as "sweating" onions and other veggies. Burn em
over a flame, roast em in the oven, dip em in hot oil, ALL TO BLISTER THE
SKIN and then put them in a some kinda wrap; a plastic bag, paper bag, towel
, as one stated, stick in the freezer to preserve and all this to take the
skin off, peel later.

It is to get the hard outer layer off so as to get to the tasty inner skin.

Don't make it difficult.

de