1 kilo beef sirloin steaks
1/4 cup olive oil
1/4 cup lime juice
2 tablespoons fajita seasoning mix
1 tablespoon oregano
1 cup red onions thinly sliced
8 flour tortillas
2 cups sliced mangoes
1.Place steak in a ziploc bag.
2.Stir together oil, lime juice, fajita seasoning and oregano, reserving 2 tablespoons.
3.Pour remaining mixture into bag with meat.
4.Refrigerate for 4-24 hours, turning bag occasionally.
5.Preheat grill to medium. Place onions on an 18-inch square of aluminum foil.
Drizzle with reserved lime mixture.
6.Bring up two opposite sides of the foil and seal with a double fold. Fold remaining ends to completely enclose, leaving space for steam to expand.
7.Wrap tortillas tightly in aluminum foil.
8.Drain steaks and discard marinade. Grill steak for 14-18 minutes for medium-rare (or longer to desired doneness). Add package of onions to grill during the last 10 minutes of grilling.
Add wrapped tortillas to grill during the last 5 minutes of grilling.
Thinly slice meat and serve with onions and sliced mango in warm tortillas.