Source: The original recipe from 1390 from Forme of Cury. Form of Cure, originally from Curye in Inglysch, edited by C. B. Hieatt and S. Butler, London 1985). From Middelaldermad by Bi Skaarup & Henrik Jacobsen. There are many other transcriptions of this recipe, but this is the one I used.
You can find other versions of the recipe @medievalcookery.com