From an Epistle of the Same to the Blessed Amphilochius on the Difference of Meats.
(Found translated in Lib. cit., p. 287, part of Epistle ccxxxvj.)
Against the Encratites, who would not eat flesh.
This search engine was created by Christos Jonathan Hayward (contact). You are invited to visit his Orthodox books and theology section.
If you are looking for a place to start, you might consider Silence: Organic Food for the Soul.