This is an excerpt from An Anonymous Andalusian Cookbook
(Andalusia, 13th c. - Charles Perry, trans.)
The original source can be found at
David Friedman's website
Another Recipe. Take fat meat, as told earlier, and prepare as before, and when the meat is done, squeeze over it the juice of a pounded onion and add the aforementioned concentrate of pomegranates, rose preserve and put in the bread oven, with admirable results.