Steak
Steak is forbidden.
This prohibition applies specifically to steak rather than to all beef.
According to Rolloist tradition, the First Prophet once ate steak and afterward suffered a terrible toothache. In his heart, he felt that Malk was disappointed in him. From this event came the prohibition against eating steak.
Eating steak is considered an insult to Rollo, to Malk, and to the First Prophet.
Other permitted forms of beef remain unaffected, unless prohibited elsewhere in dietary law.