A Jewish pastry eaten as a snack, especially in New York. The dough is wrapped around a variety of fillings, traditionally potato, onion and buckwheat groats, or they may be filled with cream cheese, chicken liver, meat or rice, and then baked. Doughs vary from country to country. In America, they tend to be potato or egg doughs; in France, where they take the Russian name pirozhki, they use yeasted dough or puff pastry. Buy knishes from delicatessens, knish specialists and bakeries.