[food] "the custard fish of civic responsibility"

In the Before Times, I had sexual health check-ups and the like in Soho. Soho is conveniently just across the road from Chinatown, so after Attending Clinic I would head back over, to the Chinatown Bakery with the taiyaki conveyor belt, and I would wave a £2 coin at the person staffing it through the window (because the entrance has a couple of steps, but if you can pay in exact change then you can get four taiyaki directly off the person managing them rather than having to queue up for the till), and then I would get handed a small paper bag containing The Custard Fish Of Civic Responsibility.

These also sometimes manifest as The Dumplings Of Civic Responsibility, or The Jianbing Of Civic Responsibility, or what have you. But I specifically confused a friend last week by referring to "the custard fish of civic responsibility" out of the blue, and now I am trying to work my way up to making them.