In a mixing bowl, combine Flour, Water, Egg, Salt and Dashi Powder to make batter.
Slice Zucchini into thin strips, but not too thin, and add to the bowl. Add all other ingredients and mix well.
Oil a barbecue hotplate or a frying pan and pour the Zucchini mixture to form a large pancake. *Note: You might prefer cooking 2 small pancakes.
Cover with a lid and cook over medium low heat for 5 minutes. Flip the pancake over using a large plate, cover with the lid, and cook for 5 minutes until Zucchini mixture is cooked. You may turn the pancake over a few times while cooking.
*Note: If you wish to bake it in the oven, bake at 220°C for 15 to 20 minutes or until cooked.
Place the pancake on a plate, dress with Okonomiyaki Sauce and Japanese Mayonnaise, and sprinkle with Aonori.
