01 - Preheat the oven to 340°F. Line the bottom of a 9-inch springform pan with parchment paper.
02 - Pulse the graham crackers until finely ground. Mix in melted butter, sugar, and salt. Press firmly into the bottom of the prepared pan. Bake for 10 minutes, then let cool while preparing the filling.
03 - In a large bowl, beat together the Greek yogurt, cream cheese, and sugar until smooth and creamy.
04 - Add the eggs one at a time, mixing well after each addition. Stir in vanilla extract, lemon zest, lemon juice, cornstarch, and salt until fully incorporated.
05 - Pour the filling over the cooled crust. Smooth the top with a spatula. Bake for 50 minutes, or until the center is just set but still slightly wobbly.
06 - Turn off the oven, crack open the door, and let the cheesecake cool inside for 1 hour. Remove from oven and let cool to room temperature.
07 - Refrigerate for at least 4 hours, preferably overnight, until completely set.
08 - Mix sour cream (or Greek yogurt) with powdered sugar and vanilla. Spread over the chilled cheesecake before serving.
09 - Slice with a sharp knife dipped in hot water for clean edges. Serve with fresh berries or fruit compote if desired.