Step 1

Gather all the ingredients.

Step 2

Grate ginger and slice green onion thinly.

Step 3

Combine the tataki sauce ingredients in a small bowl.

Step 4

Heat the oil in a non-stick frying pan. When the oil is hot, sear the tuna 30 seconds on each side.

Step 5

When all sides are seared, remove from the heat and let it cool. Slice the tuna into ¼ inch (6 mm) pieces. Pour the sauce and serve.

Step 6

You can keep the leftovers in an airtight container and store in the refrigerator for a day.