My grandmother Alma made the best cheesecakes on the planet, including a white chocolate cheesecake that was to die for. My grandmother used Philly cream cheese, but I also add mascarpone to my cheesecake, for a flavor that is a little lighter and less sweet, yet still rich and delicious.
03Pour the batter into the pan. Bake until the top of the cake is a deep golden brown and a toothpick inserted in the center comes out clean, 35 to 40 minutes. Let the cake cool in its pan on a rack for 15 to 20 minutes. Run a knife around the sides of the cheesecake. If using a cake pan, invert a serving plate over the pan and reinvert the cheesecake on the plate. If using a springform pan, remove the sides and set the bottom on a serving plate. Let cool completely.
04In a medium bowl, mix the blueberries with the 2 tablespoons sugar and the remaining 1 teaspoon lemon zest. If using fresh berries, crush a few with the back of a spoon to encourage juices to form. (Taste the fruit; if it's too tart, add another teaspoon of sugar.)
05When ready to serve, dust the cheesecake with confectioners' sugar, if using, and spoon the blueberries over the cheesecake. Cut and serve with a dollop of whipped cream or creme fraiche, if you like.