Heat a comal or cast iron skillet over a medium high heat. Toast the chiles, turning them constantly so they don=t burn, 30 to 60 seconds. Let them cool and remove their stems. Crumble them with their seeds and veins.
Toast the tomatoes and garlic until slightly charred. Let them cool. In a blender combine the chiles, garlic, tomatoes, salt, and water and blend until you have a rough sauce. Pieces of the chiles should be visible. Transfer salsa to a bowl and stir in the cilantro.