Set a large, heavy pan over medium-high heat and coat with oil. Season steak all over with salt. Once pan is hot, lay in steak and cook until thickest part is medium-rare, about 4 minutes per side.
Heat 6 tsp sesame oil in a skillet over medium-high heat. Season flank steak with salt and pepper. Place in hot pan and cook 3 minutes per side, or until done to your preference. Transfer to a ...