Dark Film on Biga??
So I took my Biga out of the fridge after an overnight stay and this is what greeted me. A very thin, but very dark film on top. The light area is where I scraped some of it off to show the difference between normal coloration and the dark film.
Has anyone seen something like this before? I'm assuming some sort of sterilization procedure is in order.
Biga recipe (Reinhart whole-wheat challah biga):
4 egg yolks