Hi Alwina,
I have just checked the
menu for Min and Bill's Dockside Diner at Disney's Hollywood Studios on the Walt Disney World website and there is no mention of a frankfurter pretzel roll being available.
I did also take a look at the menu section of the unofficial website www.allears.net (which was last updated in December 2015) and can tell you that there was a "Smoked Sausage - in a pretzel roll with sauerkraut, mustard, served with chips" showing as being available at that time.
It therefore looks as though the menu has been updated at some point between December 2015 and now and that the frankfurter pretzel rolls are no longer available at this dining location.
Although the legendary "Grey Stuff" dessert is not available from
Be Our Guest restaurant during breakfast, you can order The Master's Cupcake which is a chocolate sponge cake topped with Lumiere’s special “Grey Stuff”.
Wishing you a magical trip filled with memories which will last a lifetime!
Emma