Just throwing this out here. From my point of view, the specialties have always been pre fixe, with some add-ons. It's been one cover charge for appetizer, main, and dessert. Sounds like pre fixe to me. I'll be surprised if they put out a separate menu for this.
Definition from the wisdom of the internet:
A prix fixe (a French term meaning “fixed price”) is a menu that offers a full meal at a set rate. Typically, that means diners get three courses consisting of an appetizer, entrée, and dessert. Diners choose from multiple options for each of the three courses, but the price remains the same no matter the selection.