Step 1

In a bowl mix together the soy sauce, sesame oil, brown sugar, minced garlic, and ginger. Set to the side.

Step 2

Rinse and pat dry the tuna steaks. Season with salt and pepper to taste on both side.

Step 3

Heat a skillet to high heat with the grape seed oil. Place tuna steak in skillet (you should hear a searing sound). Cook 2 minutes, then flip.

Step 4

Spoon half the sauce into the pan during the last minute of cooking.

Step 5

Remove the tuna steaks and slice thin (or keep whole).

Step 6

Pour half the remaining sauce over the tuna steaks, and sprinkle with sesame seeds, dividing evenly. Enjoy.