Tear all the chiles into large pieces and toast them in a large dry skillet over medium heat until they change color a bit, about 2 minutes. Add the spices and continue to toast for 2 to 3 minutes until everything is fragrant. Remove from heat and carefully add about 1 cup of hot water to just cover the chiles. Turn the heat to low and simmer for about 15 minutes.
Douglas, I was just wondering about using the iron skillet or comal and the tomatoes. I tried a different recipe the other day and used my iron skillet to toast the ancho chilies, tomatoes and serrano peppers it called for. After blending all the ingredients, I used the same skillet to heat and cook the finished sauce. I only thought about it after the fact and wondered if the acidic sauce changed in flavor by using the iron skillet. I am sure our grandmothers used their iron for everything and never worried about the acid in them, so I am sure this question is moot, but I still want to know. I am not a very good cook, even though I try, and last weeks sauce did not turn out very tasty. I am going to give this one a try and hope it comes out better. Thank you for posting this.
I just tried this recipe for the first time and it is delicious! My husband and I love spicy so I added 4 habaneros to the batch (seeded of course). It has a great kick but not too much. I also added a bit more cilantro because we love that flavor as well. It turned out great. I will vary the amounts as I continue to use this recipe. Thank you for sharing!