This is an excerpt from A Book of Cookrye
(England, 1591)
The original source can be found at
Mark and Jane Waks' website
How to make Tartes of Spinage. Boyle your Spinage very tender, and three or foure apples with it, and when it is very tender, straine it through a faire cloth, and then season it with the yolk of an egge, Sugar, Sinamon, and Ginger.
Tartes of Borage after the same fashion.