there are many posters detailing the various Mexican-tradition chiles
before using dried chile peppers, they should first be either be ground into powder form, or rehydrated[2][3][4]
locally, the best place to buy them is at an authentic Mexican (or Latin American) market
drying chiles is a great way to preserve them, and because they have a longer shelf life, it's possible to buy good quality dried chiles from many places online