Burn 4 tomatoes almost down to a crisp; these took no less than 30 minutes; it's easier when at carbon barbecue. This is a iron cast comal, the sheet is pretty thin it even is broken but still works
As for the chilis, toast them no more than 3 minutes; and remember to keep very well ventilated your work area, the aroma will make you cough and cry and think of your grandparents
