This is an excerpt from Le Menagier de Paris
(France, 1393 - Janet Hinson, trans.)
The original source can be found at
David Friedman's website
NEW BEANS. Boil till they split, then take plenty of parsley and a little sage and hyssop, and grind very fine; and after this grind up some bread, and a handful of these same beans which should be peeled and ground with the bread for thickening, then put through a sieve: then fry the rest of your beans in bacon fat, if this is a meat day, or in oil or butter, if this is a fish day; then put your beans in meat stock, if this is a meat day, or in the water from the beans, if this is a fish day.