Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
I am not quite sure that Consubstantiation is Orthodox teaching, because it affirms that there is both the substance of bread and Body, wine and Blood. Christ is not joined by essence or even hypostasis to the Bread and Wine, rather they become His Body and Blood, through metousiosis. Ethiopian Fathers have explained to me that the Holy Communion only appears as bread and wine, but there is no longer bread nor wine, but the Living and Glorious Body and Blood of Jesus Christ. Consubstantiation tries to explain why the Holy Communion remains bread and wine, by suggesting that Christ is joined to them, either by essence (doubtful) or hypostasis (illogical) so as to explain how we do not see Human Flesh and Blood on the altar. It is a pseudo-scientific explanation, but such is a Mystery.
Metousiosis is a simplistic explanation, there was bread and wine, there becomes the Body and Blood substantively. This is both by essence and hypostasis, as no essence can exist without a manifested form (hypostasis) and no hypostasis can exist without a defining essence/nature. The Holy Communion IS Jesus Christ, so how could He also be by essence or substance bread and water?