2green onionswhite and light-green part, finely chopped
2Tablespoonscoarsely grated ginger
1 ½poundsthick tuna steak
Mix vinegar and 2 Tablespoons water with green onion and ginger in a bowl. Place tuna in mixture, and marinate about an hour.
To cook, remove tuna from marinade; set marinade aside. Press sesame seeds into both sides of tuna. Heat nonstick pan to medium, and add oil. Quickly sear tuna on both sides, just a couple of minutes -- seeds brown quickly. Remove tuna from pan, pour in reserved marinade, and bring to a boil. Pour over tuna, and serve.
Sesame Crust Tuna with Balsamic Glaze https://gourmetliving.org/sesame-crusted-tuna-with-balsamic-glaze/