De observatione ciborum ("On the Observance of Foods") by Anthimus, a Byzantine physician at the court of the Ostrogoth king Theodoric, concerns foods and their preparations as well as the use of foods for selected ailments such as dysentery, diarrhea, edema, and fever. It was edited by Valentine Rose from two 9th century codices in St. Gall and Bamberg, an 11th century manuscript at St. Gall, and a 12th century manuscript at Paris. Digital facsimile of the 1877 edition from the Internet Archive at this link. English translation by Mark Grant as Anthimus: On the observance of foods (1996).