[Sca-cooks] "Custard" Crust?

[Micheal]

 I just finished serving "crustade" only thing close to custard was the 
beaten eggs on top. Crust was a pastry coffin filled with veal, dates, 
herbs, and spices topped with dates and beaten eggs. Straight out of HAR.  I 
don`t see how it could have been mistaken for a crust but then again scribes 
have changed names and places with the stroke of a pen.
 Cealian Of Moray