A knish is snack that is baked, grilled or deep fried dough and filled. This East European snack has been made popular in North America. Street vendors in areas with a large Jewish population sell Knishes at hotdog stands and butcher shops.
The filling is usually mashed potatoes, ground meat, onions, buckwheat groats, sauerkraut or cheese. Sweet versions are filled with fruit.
They are round, rectangular or square and can be bite-sized or as big as a sandwich.