Pierogi or vareniki are half circular dumplings of unleavened dough, stuffed (singularly or in various combinations) with mashed potatoes, cheese, farmer's cheese, bryndza, cabbage, sauerkraut, meat, mushrooms, or other savory ingredients depending on the cook's personal preferences.[1] Dessert versions of the dumpling can be stuffed with a fresh fruit filling, such as cherry, strawberry, raspberry, blueberry, peach, or apple; stoned prunes are also sometimes used.
Mashed potatoes mixed with farmer's cheese and fried onions is a popular filling in Poland and Ukraine. In Poland this variety is called Ruskie pierogi.[2] A popular filling for pierogi in Canada is mashed potatoes mixed with grated cheddar cheese.