Remove alrady thawed steak from refrigerator about 50 minutes before grilling
Combine thyme, garlic and pepper; press evenly onto flat iron steaks.
Allow stake to rest on plate on countertop for about 45 min
Place steaks on grill over medium, ash-covered coals.
Grill, covered, 7 to 9 minutes for medium rare to medium doneness, turning once.
During last 2 minutes of grilling, sprinkle with cheese.
Season with salt, as desired.