A blend of whole-milk ricotta and mascarpone provided plenty of flavor and a rich, creamy texture, while whipped egg whites lightened the cake. Semolina flour gave structure to the cheese mixture and created a “crust” on the exterior. While we loved the flavor of Marsala here, dry sherry was a decent substitute. A fruit compote or citrus curd is the perfect partner to this barely sweet cheesecake. Our favorite grocery-store brand of ricotta is Calabro.