Only 6 ingredients are needed to make this fiery-hot Roasted Tomatillo Salsa with Chile de Arbol. The toasted chiles de arbol give this salsa an extra spicy kick and making it a perfect topping for tacos.
Heat comal (griddle or a heavy bottom pan) to medium heat.
Roast tomatillos on the comal. Turn them periodically until all sides are charred and the tomatillos have softened. Set aside.
Next, place the chiles de arbol on the same comal. Quickly toast the chiles for only 5 seconds on each side. Be careful not to leave them on the comal any longer or the chiles will taste bitter.
Place the chiles, tomatillos, onion, peeled garlic cloves, and salt to taste, and half a cup of water in the blender.