1. Set your grill to the hottest temperature. While the grill heats, dry the tuna steaks with paper towels and rub some pepper and salt on them. If you’re using frozen steaks, be sure to thaw at room temperature for 30 minutes before you begin.
2. Cook the tuna steaks on the grill for about 30 to 60 seconds on each side. You want the sides to attain a light beige or brown, with an internal temperature of 115F.
3. Set the tuna down, allow them to cool, and serve sliced against the grain with more pepper and salt if you want. You can also drizzle olive oil on top of the slices. Let the portions be almost half-inch thick.

Another amazing grilled tuna steak recipe can be viewed here.