In Nabokov's novel <i>Pnin</i>, there is the academic Blorenge, who somebody says calls to mind the legendary head of a French Department who thought that Chateaubriand was a famous chef. His interlocutor says, "Be careful! That story is told of Blorenge, and it is true." (From memory, probably slightly wrong.)
The Chateaubriand steak was indeed named after him but he didn't create it. One story says it was invented by his personal chef, another story asserts it was created to honor the publication of one of his books.
See https://en.wikipedia.org/wiki/Chateaubriand_steak
Here's his tomb at the outskirts of Saint-Malo in northern Brittany https://i.imgur.com/jVwuEdU.jpg