This is an excerpt from Fourme of Curye [Rylands MS 7]
(England, 1390)
The original source can be found at
MedievalCookery.com
.lxxviij. Slete soppes. Tak white of lekes & slyt hem & do hem to seeth in wyne, oyle & salt, tost brede & lay in disches & the sewe a bove and serve hit forth.
Original manuscript image: f42r
Other versions of this recipe:
Slete Soppes (Forme of Cury)
Recipes with similar titles:
Slitte soppes (Ancient Cookery [Arundel 334])