Homemade Mexican Chile Paste is a basic recipe 101 for making a paste from dried chiles to be use in a variety of Mexican dishes: moles, enchiladas potosinas, etc.
If making this paste for Enchiladas potosinos, use 2 1/2 cups water for the soaking liquid, use only guajillo peppers, grind them into the paste with only 1/2 cups of the soaking liquid (push through a tami if you want the paste to be superfine) then add the remainder of the soaking liquid to the paste and combine with 500g of corn mesa for the dough. The addition of the onions and garlic is not traditional, but tastes good!