New York NOSH is a term used to describe the traditional Jewish cuisine of New York City. The term is derived from the Yiddish word 'NOSH, ' which means to snack. One of the most popular dishes associated with New York NOSH is the knish, a savory pastry filled with mashed potatoes, ground meat, onions, and spices. Knishes are usually served as an appetizer or side dish, and can be found in many delis and bakeries throughout the city.