Shred the cabbage.
Thinly slice the carrot and onion as well.
In a bowl, mix eggs, pancake mix, and water.
Add the prepared vegetables to the batter and mix well.
Heat oil in a pan and spread the batter into a round shape.
Cook on medium-low heat until both sides are golden brown.
Finish by topping the okonomiyaki with sauce, mayonnaise, and bonito flakes.