Basic Beef Fajitas

1 medium onion
1 tsp. Pure chili powder
1/4 cup fresh lime juice
2 1/2 lb. Skirt stake
2 Tbs. Olive or peanut oil, in frying the stake
12 scallions, trimmed
12 corn tortillas
Salsa Verde

Grate onion through fine holes. Place in pan large enough for the meat. Add chili powder and lime juice and stir. Place stake in mix to marinate for 30 minutes, turning once, up to 2 hours. Grill or fry with oil. Let rest for 5 to 10 minutes. While resting, grill/fry scallions (5 minutes), remove and cut crosswise in 3 to 4 pieces each. Just before serving, dip tortillas in salsa Verde. Heat in pan or oven. Cut stake across grain in thin slices.