Finely chop the cabbage and green onion.
In a bowl, mix flour, eggs, and water to make a batter.
Add the chopped cabbage, green onion, and pork belly to the batter and mix well.
Heat oil in a pan and pour in the batter.
Once one side is cooked, flip to cook the other side as well.
Drizzle okonomiyaki sauce and mayonnaise on top.
Finish by sprinkling bonito flakes and dried seaweed.