First, the sauce, combine the ingredients marked with ◎, microwave for 20 minutes at 500 W, and blend well.
Slice the seared slapjack tuna into 6-7mm thicknesses, and sprinkle with black pepper.
Put the tuna in a bowl, mix in the mayonnaise, sprinkle with flour, and coat evenly.
Heat vegetable oil in a pan, and over medium high heat, cook both sides of tuna from Step 3 until golden brown.
Turn off heat and soak up excess oil with a paper towel.
Return to medium-high heat, add 3 tablespoons of sauce from Step 1, then remove from heat once the tuna is coated evenly.
Arrange on serving plate, drizzle 1 tablespoon of sauce from Step 1 on top, and garnish with scallions and bonito flakes.
Serve with sauce so that you can adjust to taste while eating.
Add your choice of greens to the side for a good balance, and serve.
Story Behind this Recipe
I had a craving for a spicy teriyaki sauce, so I used handy katsuo-no-tataki and seasoned with spicy teriyaki. I'm posting it here since it turned out so tasty.
It's key to remove the excess oil with a paper towel. That way, it won't turn out too oily. This recipe makes plenty of sauce. If you have leftover sauce, it goes great as topping for deep-fried foods, okonomiyaki (Japanese pancakes), or yakisoba (stir-fried noodles), etc. Use the sauce recipe for when you run out of okonomiyaki sauce!