Place tomatillos in pot of cold water and bring to a boil, reduce to a simmer and add arbol chiles and garlic. cook 15 minutes.
Preheat broiler to high and place a rack near the top of the oven. Broil tomatoes until skin is blackened on all sides.
Place the chiles, salt, garlic, and one each of the tomatillos and ripe tomatoes in the food processor and blend until very smooth. Add the remaining tomato and tomatillos and pulse a few times until everything is blended and you have a chunky salsa. Serve.