The most expensive dinner was a dinner at
„Im Schiffchen“ in Düsseldorf-Kaiserswerth (3 Star Guide Michelin) in 1998 : 630,00 DM (320,00 EUR) for me and a girl-friend.
The dinner was good, but Jean-Claude Bourgueil is not always on top level.
I prefer the Restaurant
Vieux Sinzig in Sinzig (a village near Koblenz) or
Steinheuers Restauran in Bad Neuenahr-Ahrweiler.