Grate peel and squeeze lime juice. Chop onion. In 13 x 9-inch dish,
combine lime juice, lime peel, onion, chili powder, red pepper and
salt. Add steak, turn and marinate for 4-5 hours, turning several
About 1 hour before serving:
Remove steak from marinade. Pour marinade into a 1-quart saucepan,
heat to boil, boil 5 minutes and pour into small bowl. Beat with
fork while adding olive oil in thin stream. Set aside.
Cut tomato wedges, cut avocados into thin wedge, and warm tortillas