What does Beatrice say that Benedick is an expert at when they first converse in Much Ado About Nothing?

When Beatrice first hears that Benedick, along with Don Pedro
and the other soldiers, are coming to Messina, Beatrice immediately begins to mock Benedick. She
says he's a "...valiant trencherman; he hath an excellent stomach." She is saying that he's a
good eater and that he eats a lot. This is an insult because she suggests that Benedick is more
interested in satisfying his desire for food rather than his desire to be a good soldier. She
asks the messenger who tells Beatrice and the others that Don Pedro and his men are coming how
many of the enemy has Benedick eaten. This confuses the messenger who does not know of the "merry
war" between Beatrice and Benedick. That's when Beatrice calls Benedick the valiant trencherman.
When Benedick arrives, he and Beatrice begin exchanging insults
immediately.