1945 menu from American USS Bowfin sub
The USS Bowfin can be toured in Pearl Harbor, Hawaii. (Or used to be, anyway.) It was cramped in there, but not quite as bad as on the sub in Das Boot.
There is the menu for the week of 28 May 1945 on display at the exhibit.
http://maritime.org/pres/potrack/img/bowfinmenu.jpg
(If/when that link above goes bad, you might be able to find a copy of the menu by doing an internet search.)