Beef tenderloin Wellington – Rinderfilet Wellington
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A fairly traditional dish dedicated to Arthur Wellesley, Duke of Wellington, the victor of the Battle of Waterloo. It's not really cheap either, with prices per kilo for beef fillet being around €100/$100.
The recipe probably comes from the older French Filet de boeuf au crôute. The Wellington variant appeared in German-language cookbooks around 1900. I can hardly think of a reason why the Grande Nation would honor its conqueror...