This is an excerpt from The Prince of Transylvania's Court Cookbook
(Hungary, 16th c.)
The original source can be found at
MedievalCookery.com
Roast herring. If you have time, leave it in water for days, then let it dry. Roast it, but not for long. Serve it when hot. This is ideal food for fasting. You can serve it with cabbage, lentils, peas or oily sauce.