[pvaldes]

> if you want to prevent cross-contamination, you will need separate set of everything

A company could do everything right and still would risk to be destroyed by an angry employee or plain boycott from a competitor. The only safe move is to stop making an everyday product with such legal risks.

Specially if is a niche product for a small number of potential clients. The reward of selling a few buns more does not worth the headache.