Carne Asada Tacos

Marinade
1/2 cup chopped onion
3 cloves garlic, chopped
3 tablespoons fresh lime juice
1 tablespoon ground chile de arbol or
    New Mexican red chile powder
1/4 teaspoon ground cumin

Tacos
1 (1 1/2 pound) skirt steak, trimmed of fat
    and the white membrane
6 onions
Vegetable oil
12 small corn tortillas

Garnishes
Pico de gallo salsa or your favorite tomato based salsa
Guacamole
Chopped fresh cilantro

Put all the Marinade ingredients into a blender or food processor and puree until smooth. Cover the steak with the marinade and marinate for 1 hour at room temperature, or 4 hours or more in the refrigerator.

Prepare a charcoal grill and when the coals are medium hot, brush the onions with the oil and place over the coals to roast, turning frequently so they don