This is an excerpt from Forme of Cury
(England, 1390)
The original source can be found at
the Project Gutenberg website
Salat. XX.III. XVI. Take persel, sawge, garlec, chibolles, oynouns, leek, borage, myntes, porrectes, fenel and ton tressis, rew, rosemarye, purslarye, laue and waische hem clene, pike hem, pluk hem small wiþ þyn honde and myng hem wel with rawe oile. lay on vynegur and salt, and serue it forth.
Other versions of this recipe:
Salat (Fourme of Curye [Rylands MS 7])
If you would make a good sausage for a salad (Das Kuchbuch der Sabina Welserin)