Remove the steaks from the foil package and transfer them to the prepared grill rack over direct heat. Cook for 3 minutes, then rotate the steaks 90 degrees to make a criss-cross grill mark, and cook for 3 minutes longer. Flip the steaks over and cook for 5 to 7 minutes longer, until the internal temperature reaches 145˚F for medium-rare. Transfer the steaks to a plate, grill-marked side up. Let stand, covered, for 5 minutes.