01 -
In a medium bowl, combine chopped cilantro, olive oil, soy sauce, orange juice, lime juice, minced garlic, jalapeño, and ground cumin. Mix well to create the marinade.
02 -
Place flank steak in a large resealable plastic bag or shallow dish. Pour marinade over the steak, ensuring it is evenly coated. Seal bag or cover dish and refrigerate for at least 1 hour, preferably overnight for maximum flavor.
03 -
Heat a cast iron grill pan or large cast iron skillet over medium-high heat until very hot to ensure proper searing.
04 -
Remove steak from marinade and pat dry with paper towels to promote a better sear. Place steak on the hot grill pan and cook for 4 to 6 minutes per side, depending on desired doneness. Avoid moving the steak during cooking to develop a charred crust.
05 -
Transfer cooked steak to a cutting board and let rest, tented loosely with foil, for 5 minutes to redistribute juices. Slice thinly against the grain for optimal tenderness.