Preheat pie maker. Wait for the green READY light to go on.
Meanwhile, whisk eggs, milk, flour and baking powder together in a bowl. Season with salt and pepper. Stir in coleslaw mix.
Spray pie maker with oil. Place one-sixth of the mixture into each hole. Close lid and cook for 3-4 minutes or until about half cooked. Using a spoon or fork, flip pancakes over, pressing into holes. Cook for a further 3-4 minutes or until cooked through. Remove from pie maker. Continue to cook remaining pancakes.
Transfer okonomiyaki to a serving plate. Drizzle with mayonnaise and okonomi sauce and scatter with shallot.
Tips & Hints:
Note: Okonomi sauce is a Japanese-style barbecue sauce traditionally served with okonomiyaki. Find it in the Asian aisle of large supermarkets. You can substitute with tonkatsu sauce or, at a pinch, a good barbecue sauce.