Finely chop the cabbage and green onion.
In a bowl, mix flour, eggs, and water to make a batter.
Add the chopped vegetables, seafood (shrimp or squid), and bacon into the batter.
Heat oil in a pan and spread the batter out evenly.
Cook on medium-low heat until both sides are golden brown.
Top with mayonnaise, okonomiyaki sauce, katsuobushi, and seaweed flakes to finish.