Fajitas

375 g beef (pounded flank steak worked well)
tortillas

Marinade:
1/4 c lime juice
1/2 c balsamic vinegar
2 tbsp soya sauce
1 tbsp chopped garlic
1 tbsp chili powder
1/2 tsp hot pepper flakes
2 tsp salt

Stir fry ingredients:
1/2 red onion, thinly sliced
3/4 cup red pepper strips

Optional fillings:
sour cream, salsa, refried beans, chopped lettuce, shredded cheese, chopped tomato, green onions, cilantro, etc

Pound meat if required, to tenderize. Slice meat into thin strips. Combine all ingredients for marinade and marinate for several hours.
Drain meat. Stir fry in 1 tbsp oil until browned (3-5 minutes). Add onion and pepper strips and cook a few minutes more. Keep warm.
Warm 2 foiled-wrapped tortillas per person in a 325 degree oven.
Serve with sour cream, salsa, refried beans, chopped lettuce, shredded cheese, chopped tomato, green onions, cilantro, etc.