The first Thanksgiving was celebrated by the Pilgrims after their first harvest in the New World in October of 1621. The feast lasted three days and was attended by about 90 Native American Wampanoag people and 53 survivors (Pilgrims) of the Mayflower.
What did they eat?
According to historical records they ate five freshly killed deer, assorted wildfowl (like ducks and geese), lobster, cod, bass, flint, plus the Native Americans brought a native variety of corn, which was eaten as corn bread and porridge. They also shared fruits and vegetables, mussels, bass, clams, and oysters.