There are not many traditional Sukkot recipes, apart from kreplach (stuffed dumplings). The menus are often more about finding inspiration from the harvest origin of the holiday, and most meals include fresh fruits and vegetables, or other harvest-related ingredients like apples, dates, grapes, figs, and pomegranates.
Of course, challah, chicken soup, and kugels are traditional Jewish foods that can be served on Sukkot (or any time of the year).
Sukkot is an agricultural festival that was originally considered a thanksgiving for the fruit harvest and is celebrated by building a sukkah, a hut-like structure that the Jews lived in during the 40 years of travel through the wilderness after the exodus from Egypt. As a temporary dwelling, the sukkah also represents the fact that all existence is fragile, and therefore Sukkot is a time to appreciate the shelter of our homes and our bodies. Jews are required to eat all of their meals in the sukkah for eight days. The sukkah is decorated and the first day is considered a holy day in which most forms of work are forbidden.