Finely chop the cabbage and green onion.
Beat the eggs in a bowl and mix in the chopped vegetables.
Heat cooking oil in a pan and pour the egg and vegetable batter into a round shape.
Place sliced pork belly on top of the batter.
When one side is cooked over medium-low heat, flip it to cook the pork side.
Once both sides are crispy and browned, transfer to a plate.
Drizzle with okonomiyaki sauce, mayonnaise, and sprinkle with bonito flakes.