Google tells me that pesach is another word for Passover. The sponge cake is tagged as “big cake” which I assume means it serves a lot.
Pesach Sponge Cake (Big cake)
Beat 7 yolks & 2 whole eggs – 10 minutes
Add 1 3/4 c sugar
Beat 10 minutes, use 2x large eggs
Add 1 scant cup potato starch
Beat 10 minutes
Beat 7 whites until stiff – add pinch of salt. Fold in.
Bake 70 minutes 325º