I came up with these since I wanted some kind of hanpen bento item.
My four-year-old loves these so much and gets really excited when I made them.

Pounding them evenly will make it easier to get a nice round shape. If the lumps are too big, the batter will clump up and not come out smoothly.
Alternatively, you can squeeze out an appropriate amount, roll it into a ball, press it flat, then fry.
It's a very versatile recipe. Try in a variety of ways, like adding cheese, shiso leaves, edamane, or sesame seeds. It might also be good with a bit of katakuriko potato starch to give it a chewy texture.
Be careful not to use too much salt. Recipe by Aozoranotukisama