I am not completely certain but I believe the authors' mother was saying "F the bread it is over" as a sort of metaphor regarding last years fad of baking bread during the lockdown and how it is no longer important.

It could also be a commentary on the ketogenic diet movement gaining ground in recent years.

Bread is also slang for money so it could be refering that the author cant make any money but thats a stretch.

On a side note, one of my favorite science/fantasy fiction authors is a professor at Brigham Young University. He completed possibly the greatest fantasy series every written, so I don't see any reason why a class about fairytales wouldn't work.