If Jesus was to use a real lamb to give us His REAL Bodily Presence, then what would He have used for drinking His blood? The blood of the lamb?
Also the idea of bread and wine is not foreign in the Old Testament:
Exodus 25:
[23]
"And you shall make a table of acacia wood; two cubits shall be its length, a cubit its breadth, and a cubit and a half its height.
[24] You shall overlay it with pure gold, and make a molding of gold around it.
[25] And you shall make around it a frame a handbreadth wide, and a molding of gold around the frame.
[26] And you shall make for it four rings of gold, and fasten the rings to the four corners at its four legs.
[27] Close to the frame the rings shall lie, as holders for the poles to carry the table.
[28] You shall make the poles of acacia wood, and overlay them with gold, and the table shall be carried with these.
[29] **And you shall make its plates and dishes for incense, and its flagons **and bowls with which to pour libations; of pure gold you shall make them.
[30]
And you shall set the bread of the Presence on the table before me always.
They didn’t use grape juice or orange juice or water or anything else for the libation except for wine.
What about this?:
Genesis 14:
[18] And Mel-chiz’edek king of Salem brought out
bread and wine;
he was priest of God Most High.
The idea of Bread and Wine is not foreign to the OT.
Consider this: Jesus did not make the lamb a focal point and a focus of the Passover meal at the Last Supper because HE IS THE LAMB. He did not want them to focus on the lamb in front of them on the table but on the LAMB that is in front of them talking to them (Jesus).
Jesus could have used grape juice and chips ahoy for His Body and Blood but He didn’t, He used bread and wine. If you don’t think the eating of the lamb at the passover has any foreshadowing of the Eucharist, then I can show you otherwise. There are many similarities between the two.
God bless.