I learned how to cook this through my good friend Yasuko a few years ago. This is just one of the many authentic Japanese recipes she taught me. My kids became huge fans right away. They enjoyed it so much, one day I made them bring it to school, with rice and all, and they did not mind at all.
Bringing rice to school is a big NO-NO to them because other kids are just mean and would laugh at their food. The Kara-age is a big exemption :)