The only way that it is taught as far as I know and that is the in the Eucharist the bread and wine are consecrated and changed by the Holy Spirit into the body and blood of Jesus Christ.
In some denominations they have what is called communion service which does not believe or teach that.
The word Eucharist means "give thanks" communion does not mean that.
So when I speak of the Eucharist it is in regard to the belief that a miracle takes place if done according to that dogma.
Peace and kindness,