"Начинки" refers to various fillings used in culinary dishes, particularly in pastries, dumplings, and other baked goods. These fillings can be made from a wide range of ingredients, including meats, vegetables, fruits, and cheeses. Common examples include пирожки filled with potatoes or cabbage, and пельмени filled with minced meat. In addition to savory options, sweet fillings are also popular. For instance, блины can be filled with sweetened cottage cheese or fruit preserves. The choice of filling often depends on regional traditions and personal preferences, making "начинки" a versatile aspect of cooking.