Prep the Meat
Place the flank steak on a cutting board. Rub both sides with lemon juice to tenderize. Pat dry and set aside.
Season the Steak
In a small bowl, mix sea salt, black pepper, garlic powder, and smoked paprika. Rub this seasoning blend all over the steak, pressing it into the meat.
Preheat the Grill
Heat your grill to high (about 450°F/230°C). Clean and oil the grates to prevent sticking.
Grill the Flank Steak
Place the steak directly over the flame. Grill for about 6–7 minutes per side for medium-rare, depending on thickness. Use a meat thermometer to check internal temperature (130–135°F/54–57°C for medium-rare).
Rest the Meat
Transfer the steak to a cutting board and let it rest for 10 minutes to retain juices.
Slice and Serve
Slice thinly against the grain. Garnish with parsley and serve with chimichurri or your favorite side dishes.