In a large, shallow nonreactive dish or plastic bag, combine all ingredients except steak and tortillas. Add steak; turn to coat. Cover, or close bag, and marinate in refrigerator, turning occasionally, 3 to 24 hours.
Remove steak from marinade, reserving marinade. Grill or broil steak, turning once, until done.
Meanwhile, in small saucepan, bring reserved marinade to a boil; boil 1 minute.
To serve, thinly slice steak and serve in warm flour tortillas with boiled marinade and, if desired, grilled red and green bell pepper rings.
Servings: 2