Tender & Juicy!
Combine the beer, orange juice, olive oil, lime juice, cilantro, garlic, and salt, and reserve ¼ cup of the mixture in the fridge.
Add the flank steak to the marinade, and coat it all around. Marinate for 1 hour on the counter, or 2 hours in the fridge.
Preheat the grill to high, and cook the steak for about 6-7 minutes per side. Let rest for 10 minutes before serving.
Thinly slice the steak against the grain, and serve it with tortillas, pico de gallo, guacamole, and lime wedges.