Don't laugh at me but all these years I thought Chateaubriand was a platter for 2 people in a restaurant. When Mr HB and I order it, it always seems to have a filet, roasted potatos, asperagus, mushrooms, some other items and au jus. The waiter carves it at the table. It's nearly the same veggies nestled around the board, too.
Well, I've learned my new thing for the day. How embarrassing.