Last time we went, we ended up bringing home some ahi steaks, and I decided to make an experimental marinade.
Here's what you'll need: Ahi steaks, a Ziploc bag, green onions, soy sauce, chili garlic paste, sake, ground ginger...
...and ground mustard. Chop the green onions, reserving some of the tips for garnish.
Add 1/2 c soy sauce, 1/3 c sake, 2 tsp chili garlic paste,
And 1/2 tsp each of the ground ginger and ground mustard.
Close the bag and shake well to mix. Add the ahi and marinate for a couple of hours. Sear each side, then cook about 10 minutes on medium-high heat. Garnish with onion tips.