flank steak how to cook in oven
1 Carefully put flank steak in pan and close oven door. 2  After 5 minutes, flip the steak (it should be well browned on the bottom) and cook just until juices appear on surface of steak, 3 to 4 minutes more for medium-rare meat. Let skillet heat for at least 30 minutes. 2  Carefully put flank steak in pan and close oven door. 3  After 5 minutes, flip the steak (it should be well browned on the bottom) and cook just until juices appear on surface of steak, 3 to 4 minutes more for medium-rare meat.