01 - Pat the tuna steaks dry using paper towels to remove excess moisture.
02 - Brush both sides of the tuna steaks evenly with olive oil.
03 - In a small bowl, combine soy sauce, lemon juice, sea salt, black pepper, and garlic powder. Rub the mixture evenly over both sides of the tuna steaks.
04 - Heat a heavy skillet or cast iron pan over high heat until very hot.
05 - Place tuna steaks in the skillet and sear for 1½ to 2 minutes on each side for rare. Adjust cooking time according to preferred doneness, avoiding overcooking.
06 - Remove the tuna steaks from the skillet and allow to rest for 2 minutes to retain juices.
07 - Slice tuna against the grain and serve immediately with lemon wedges and optional fresh herbs.