This is an excerpt from Forme of Cury
(England, 1390)
The original source can be found at
the Project Gutenberg website
Slete Soppes. XX.IIII. Take white of Lekes and slyt hem, and do hem to seeþ in wyne, oile and salt, rost brede and lay in dysshes and the sewe above and serue it forth.
Other versions of this recipe:
Slete soppes (Fourme of Curye [Rylands MS 7])
Recipes with similar titles:
Slitte soppes (Ancient Cookery [Arundel 334])