Hi, I would like to know the types of breads that come with a centre filling. which fillings are used as a centre filling breads, rolls, and buns? Kindly provide a ranking for these centre filings used in the bread. I know some fillings used in bread such as Chocolate, vanilla, meat, vegetable, caramel, nuts, and fruits. are these used in bread as centre fillings? If yes, which ones are famous across the world? If no, then which ones are used?