1. Sprinkle steak evenly with chipotle powder and salt; rub with garlic.
2. Grill steak, covered with grill lid, over medium-high heat (350° to 400°) 8 to 10 minutes on each side or to desired degree of doneness. Cover loosely with aluminum foil, and let stand 5 minutes.
3. Cut steak diagonally across the grain into thin strips. Serve with tortillas, if desired, and Guacamole Sauce.
Note: For testing purposes only, we used McCormick Gourmet Collection Chipotle Chile Pepper for dried chipotle powder.