"Hillel the Elder is often credited as having been the inventor of the "sandwich" in the 1st century B.C.E. well over a thousand years before John Montagu, 4th Earl of Sandwich.
"This is based on a part of the Passover Seder (the annual commemoration of the Exodus from Egypt), in the section of Korech, where the Haggadah, the ancient liturgy, instructs participants to take the matzo and wrap it around the bitter herbs and eat them together whilst saying in Hebrew: This is a remembrance of Hillel in Temple times - This is what Hillel did when the Temple existed: he used to enwrap the Paschal lamb, the matzo and the bitter herbs and eat them as one. In the Ashkenazi tradition the usual practice is to do this by making a matzo and lettuce/horseradish sandwich."
And to think, all we credit for are bagels.