Traditional Passover foods and their symbolism
According to Fabulous Foods, there are many special foods to nosh on at Passover. They include:

Unleavened bread
See above on matzah

Roasted lamb bone
The roasted lamb bone symbolizes the lamb that was sacrificed at the Holy Temple of Jerusalem on the eve of the Israelites’ exodus from Egypt. The blood of that ancient sacrifice was used to mark the doors of the Israelites’, so they might be "passed over." Today, many families substitute a chicken or turkey neck for the lamb. Whichever meat you choose, roast it in the oven until done, then scorch over a flame, like a gas burner or grill. Jewish vegetarians have been known to use a whole roasted beet instead of lamb.

Roasted egg
Eggs symbolize the perpetual cycle of life, from birth to death to rebirth. To roast eggs, first hard boil them; then, using tongs, hold over a gas burner or candle flame. This is my favorite part. It’s all about the egg.

Bitter herbs
Fresh horseradish, without beets or vinegar, graces the seder plate to symbolize the bitterness of slavery. Come to think of it, this is pretty tasty on matzah.

Greens
Greens, usually fresh parsley or celery tops, represent rebirth and spring.

Salt water
The greens are traditionally dipped in salt water, which symbolizes the tears of the Hebrew slaves.

Charoset
A traditional Passover dish, charoset consists of a mixture of chopped fruits, usually apples, nuts, raisins, spices, and wine. The mixture represents the mortar Hebrew slaves used to make bricks for the Pharaoh Ramses II. Very unique, very delicious.