In an ungreased skillet over medium heat, roast the garlic, turning regularly, until soft and blackened in spots, about 15 minutes. Remove and add the chiles. Stir nearly constantly until the chiles are considerably darker and they fill the kitchen with their toasty aroma, about 1 1/2 minutes. Peel the garlic and place in blender jar with the chiles and 3/4 cup water. Blend until nearly smooth (the salsa is best, I think, if it retains a little texture). Taste a little bit (it’ll be very spicy) and season with salt, usually about 1/2 teaspoon.