Divination by means of barley meal.

Translating to 'divination by barley' in Greek, it is the practice of feeding a criminal suspect a loaf of specially prepared wheat or barley bread or cake. If the person suffers from indigestion or finds the loaf to be disagreeable to the palate, the suspect was deemed guilty. Alternatively used to determine the virginal purity of a potential bride.

uses special cakes that are digestible by persons with a clear conscience but are unpleasant to others.