Roast jalapeños. Cool, peel and seed. Blend peppers, garlic cloves and cilantro in blender. Add tomatoes. Chop to desired chunkiness. Season with salt. Chill to serve. Note: A squeeze of lemon or lime enhances the flavor. Increase ingredients less tomatoes. I generally use an entire bunch of cilantro, with a head of garlic, about 40 or so jalapenos and juice of a whole lemon. Process in the blender. Freeze in ice cube trays. Mix one cube per can tomatoes.