Deli turnovers, also known as knishes, are a type of pastry filled with mashed potatoes, ground meat, sauerkraut, or other savory ingredients. They are usually fried or baked and are popular in Jewish cuisine. The word 'knish' comes from the Yiddish language and is derived from the German word 'küchen, ' meaning cake. Deli turnovers are a delicious snack that can be enjoyed as an appetizer or side dish.