Combine 2 tablespoons lime juice, 0.25 cup cilantro, garlic, olive oil, cumin, salt, and pepper to create the marinade.
Submerge flank steak in marinade for a minimum of 30 minutes at 40°F (4°C).
Heat a heavy-bottomed skillet to medium-high heat (approximately 400°F/204°C).
Sear the steak for 5-7 minutes per side until an internal temperature of 135°F (57°C) is achieved.
Transfer steak to a resting rack for 10 minutes to allow juices to redistribute.
Incorporate remaining lime juice and cilantro into the warm cooked rice.
Slice steak against the grain at a 45-degree angle into 0.25-inch strips.
Apportion rice into 4 bowls and top with equivalent portions of beans, corn, tomatoes, avocado, and sliced steak.