The entire story of the Haggadah is contained in the Seder plate; everything on it symbolizes an aspect of Exodus:
Zeroa, a roasted bone, beet or “Pashcal yam”. Evokes the offering made at the Temple in ancient times.
Beitza, a boiled egg, symbolizes the circle of life and death.
Maror, a bitter herb, reminds us of the bitterness of enslavement.
Charoset, a mixture of fruit, nuts, wine and spices, represents the mortar our ancestors used to build the structures of Mitzrayim...