This is an excerpt from MS Douce 257
(England, 1381)
The original source can be found at
MedievalCookery.com
Lampreys in bruet. þey schulle be schaldyd & ysode & ybrulyd vpon a gredern, & grynd peper & safroun & do þerto, & boyle it & do þe lomprey þeryn & serue yt forþ.
Recipes with similar titles:
XI - FOR TO MAKE LAMPREYS IN BRUET (Forme of Cury)
Lamprays in brewte (Gentyll manly Cokere (MS Pepys 1047))