Edward Winslow's account details that "they went out and killed five deer" and mentions that "our governor sent four men on fowling" and that "they four, in one day, killed as much fowl as, with a little help beside, served the company almost a week." While it is possible that turkeys may have been killed, it is more likely that ducks or geese were the primary targets.
In addition, the crops grown by both settler and Native American would have graced that early thanksgiving dinner. Corn, squash, potatoes, yams, even wheat to make bread were, in all probability, shared and enjoyed.
Today there is such a large variety of food to choose from that a Thanksgiving Dinner can feature almost any main course. True, the traditional turkey is still the meat of choice, yet goose, duck, ham, even some of the sea's harvests can be used. In place of sweet potatoes, peas, greens, and even more exotic vegetables all make their way to this celebration of Thanksgiving and harvest.
The key to a Thanksgiving menu is to choose foods that will represent the idea of giving thanks for a good year, a harvesting of good fortune, and the sharing of the bounty of your efforts with friends and family. In today's world, the only limit on preparing a Thanksgiving Dinner is an individual's imagination and creativity.