Ingredients
5 teaspoons chili powder 
1 1/2 teaspoons ground cumin
1 1/2 teaspoons dried oregano
coarse salt and ground pepper
1 1/2 pounds skirt steak
2 teaspoons olive oil, plus more for grates
Directions
1. In a small bowl, combine chili powder, cumin, oregano, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper. Sprinkle mixture over steak; drizzle with oil. Let stand, turning to coat evenly with oil halfway through, about 10 minutes.
2. Heat grill to high; lightly oil grates. Place steak on grill (fold thin end over so steak is an even thickness); cover. Cook, turning once, until meat is desired doneness, 4 to 6 minutes for medium-rare. Serves 4
Note: Also try with top blade steak.
Source: www.marthastewart.com