The seder plate holds the main symbols of a traditional Passover seder-- the shank bone, egg, karpas, charoset, and maror. The Kabbalists of the Middle Ages added hazeret, another kind of bitter lettuce. And in recent years feminists have added an orange on the seder plate to symbolize women's leadership roles and full empowerment in Jewish life.
The artichoke however is a new development. What is an artichoke? Surely a work of God's imagination! Many petals, with thistle and a heart....