Wash and shred the napa cabbage.
Julienne the onion and carrot.
Crack eggs into a bowl and mix with the vegetables, pancake mix, and water to make a batter.
Heat oil in a pan and spread the batter thinly.
Cook until golden brown on both sides.
Plate and finish with okonomiyaki sauce, mayonnaise, bonito flakes, and chopped green onions.