4 med. limes
1/2 tsp. salt
1/4 c. olive oil
12 tortillas
1 sm. onion
1/2 tsp. crushed red pepper
4 sm. tomatoes
1 (1 1/2 lb.) flank steak
2 med. avocado
1 tsp. chili powder

About 5-6 hours early: Grate peel and squeeze lime juice. Chop onion. In 13 x 9 dish combine lime juice, lime peel, onion, chili powder, red pepper, salt. Add steak, turn and marinate 4-5 hours, turn several times.

About 1 hour before serving: Remove steak from marinade. Pour marinade into 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, warm tortilla in oven. Grill steak 5-10 minutes. Cut in thin diagonal slices.