Point to the shank bone and say :

The Passover offering which our ancestors ate in Temple times, what was the reason for it? It serves to remind us that God passed over the houses of our ancestors in Egypt, as it is written: "You shall say, it is a Passover offering before Adonai, Who passed over the houses of the children of Israel in Egypt, striking Egypt while sparing our homes. And the people bowed their heads and worshipped." (Exodus 12:27)


haggadah Section: Motzi-Matzah