1 Mix the marinade ingredients together and coat the tuna steaks with the marinade, cover tightly, and refrigerate for at least an hour.
2 Heat a non-stick skillet over medium high to high heat. When the pan is hot, remove the tuna steaks from the marinade and sear them for a minute to a minute and a half on each side ( even a little longer if you want the tuna less rare than pictured.)
3 Remove from pan and slice into 1/4-inch thick slices. Sprinkle with a few green onion slices.