Seasoned matzo meal with eggs and schmaltz
Schmaltz is rendered chicken fat and rarely found on a grocery shelf. In fact where I live I call it unobtanium. I also didn’t find a suitable, readily available resource. So I substituted duck fat which is available on the shelf of my large, nearby grocer.
Find it online: https://www.cooksavorcelebrate.com/matzo-ball-soup/