01 - Pat the tuna steaks dry thoroughly using paper towels.
02 - Brush both sides of the tuna steaks evenly with olive oil.
03 - Combine soy sauce, lemon juice, sea salt, black pepper, and garlic powder in a small bowl; rub mixture evenly over both sides of the tuna steaks.
04 - Heat a heavy skillet or cast iron pan over high heat until it is very hot.
05 - Place the tuna steaks in the skillet and sear for 1½ to 2 minutes on each side for rare doneness; adjust cooking time as preferred, being careful to avoid overcooking.
06 - Remove tuna from the skillet and allow to rest for 2 minutes before slicing.
07 - Slice the tuna against the grain and serve immediately with lemon wedges and optional fresh herbs.