Burek is a traditional Balkan savory pastry made with flaky phyllo dough and various fillings, such as meat, cheese, or spinach. This recipe features a comforting minced beef and onion filling seasoned with aromatic spices. The filling is layered between sheets of crispy phyllo dough and baked until golden brown. Serve this hearty and satisfying pastry as a main course or appetizer, perfect for any time of day.