01 - Preheat the oven to 340°F. Grease a 9-inch springform pan and line the bottom with parchment paper.
02 - Layer 6 phyllo sheets into the pan, brushing each generously with melted butter. Scatter half of the chopped pistachio-walnut mixture evenly over the layers along with half the sugar and cinnamon. Repeat with the remaining 6 phyllo sheets, brushing each with butter, then top with the remaining nut-sugar-cinnamon mixture. Press gently to compact.
03 - Bake the crust base for 10 minutes until lightly golden. Remove from the oven and allow it to cool slightly while preparing the filling.
04 - Using an electric mixer, beat the softened cream cheese until completely smooth and free of lumps. Add the Greek yogurt, sugar, and lemon zest, mixing until uniformly combined. Incorporate the eggs one at a time, beating thoroughly after each addition. Finish by stirring in the vanilla extract.
05 - Pour the cheesecake filling over the slightly cooled baklava crust. Gently tap the pan on the counter to release any trapped air bubbles. Bake at 340°F for 45 minutes, or until the center is just set with a slight wobble remaining.
06 - Turn off the oven and crack the door open slightly. Let the cheesecake rest inside the cooling oven for 1 hour to prevent surface cracking from sudden temperature changes.
07 - Transfer the cheesecake to the refrigerator and chill for a minimum of 3 hours, ideally overnight, until fully set and firm.
08 - Combine the honey, water, sugar, and lemon juice in a small saucepan. Warm over low heat, stirring until the sugar fully dissolves. Let the mixture simmer gently for 3 to 4 minutes, then remove from heat and cool to room temperature.
09 - Drizzle the cooled honey syrup generously over the chilled cheesecake. Scatter the chopped pistachios across the top and slice into 10 portions to serve.