Thinly sliced lettuce, chopped tomato, dairy sour cream, guacamole (optional)
Combine marinade ingredients in small bowl. Place beef steaks and marinade in food-safe plastic bag; turn to coat. Close bag securely and marinate in refrigerator 6 hours or as long as overnight, turning occasionally.
Remove steaks; discard marinade. Place steaks on grid over medium, ash-covered coals. Grill, uncovered, 14-17 minutes for medium rare (145 degrees) to medium (160) doneness, turning occasionally.
Carve into thin slices; season with salt. Serve in tortillas with toppings.