You asked, “Which Scripture passage states that Jesus himself consumed the bread after he blessed it and gave it to his disciples?”
CynicalBear provided the answer in comment 48. Do you care to listen to the words of Scripture, which describe Jesus and His disciples celebrating a very special Passover, or do you prefer to believe the heresy that the bread was LITERALLY Jesus’ body?
The Apostle Paul understood that the bread and wine were tokens to remember Christ’s death and resurrection, but were not His literal flesh and blood. Consider 1 Cor. 11:26, in which Paul refers to the bread as ... “bread.”
CynicalBear provided the answer in comment 48
No he didn't. He quoted Jesus saying he "I will not drink henceforth of this fruit of the vine, until that day when I drink it new with you in my Father's kingdom." Note that Jesus does not say anything about eating anything. THAT was your original snide remark I was directly addressing.
Also, Jesus' words do not even prove that he partook of any passover wine. If you offer me a glass of wine and I refuse it saying "I'm not going to drink anymore wine until after Labor Day" that doesn't mean I drank any when you offered it.
Not only do you not know the Scriptures or Catholic teaching, your logic is flawed,