Finely chop the cabbage.
Beat the eggs and mix with flour, water, and salt to make the batter.
Add the chopped cabbage, carrots, and green onions to the batter and mix well.
Heat cooking oil in a pan and spread the batter thinly to cook.
When one side is cooked, flip it over and cook both sides until golden brown.
Transfer to a plate and drizzle okonomiyaki sauce and mayonnaise on top.
Garnish with bonito flakes and green onions to finish.