No evidence?Except you have no such evidence.
Three of the Synoptic Gospels have the Last Supper accounts where Jesus says clearly "Take and eat...take and drink...this IS my body, this IS my blood."
Even Luther knew what "is" meant.
Granted--he rejected Transubstantiation, but---at the same time he is hardly Protestant on the issue either. Protestants turn in to Bill Clinton when it comes to the meaning of is: "Well how are you defining is? What does is really mean anyway?"
Then there is John 6 which is perhaps the clearest reference to the fact that we are to eat his flesh and drink his blood.
So--yeah----if none of that constitutes evidence from your view, then nothing will. In this case, you Protestants are like atheists who balk when presented with evidence of God's existence. They just redefine what constitutes evidence so as to rule out evidence you present as evidence.