Currently for Restaurants and FoodEstablishments there is a menu item:

http://schema.org/Restaurant
menu
Text or URL
Either the actual menu or a URL of the menu.

But no schema for the menu(s) and menu items themselves.

For example usage, google a restaurant name + menu such as https://www.google.com/?ion=1&espv=2#q=two%20urban%20licks%20menu

You'll see the data of a menu being used in the rich formatting.

Is anyone developing the menu and menuItem schema? If not, how does one propose?