Mince the onion and place it in a microwave-safe container. Cover loosely with plastic wrap and microwave at 600W for 1 minute. Let it cool and drain excess water.

Cut the crab sticks into 5mm pieces.

Place the hanpen in a plastic bag and mash it thoroughly. Add the onion, crab sticks, and seasoning ingredients (salt, pepper, mayonnaise) into the bag and mix well.

Divide the mixture into 4 portions and shape each into an oval. Coat each piece with flour, dip in beaten egg, and cover with breadcrumbs.