What's being a perfect image of God got to do with it?
If Jesus isn't God - it's still idolatry!
Idolatry takes away worship that is due to God and give it to something or someone that does not represent God, Jesus however despite not being the one God the Father represents(Hebrews 1:3) the one God and is his image (col 1:15), Therefore it's not idolatry.
Then, why did Jesus instruct us to do the breaking of the bread as a remembrance of Him?
We worship Christ whenever we sing about Him, or the cross.
Jesus while on earth made it extremely clear that he came to do not his own will but his Fathers and that all the things he spoke were from the Father and not his own words. The Father sent his son into the world so that it could be saved through Jesus sacrifice by means of him the Father. It is Jesus sacrifice that saves, thus it is Jesus sacrifice we must commemorate by breaking and eating of the bread and wine. This is not an act of worship to Jesus and is nowhere spoken as an act of worship to Jesus, it is your assumption this is worshipping Jesus. Jesus made is clear we are to worship the Father (see John 4:23).
(John 5:30) I cannot do a single thing of my own initiative. Just as I hear, I judge, and my judgment is righteous because I seek, not my own will, but the will of him who sent me.
(John 14:10) Do you not believe that I am in union with the Father and the Father is in union with me? The things I say to you I do not speak of my own originality, but the Father who remains in union with me is doing his works.