01 - Preheat oven to 340°F (170°C). Grease and line a 9-inch springform pan.
02 - Layer 6 phyllo sheets in the prepared pan, brushing each sheet with melted butter. Combine pistachios, walnuts, sugar, and cinnamon; sprinkle half the mixture over the layered sheets. Arrange the remaining 6 phyllo sheets on top, again brushing each with butter, and cover with the rest of the nut mixture. Gently press the layers to compact.
03 - Bake the prepared crust in the preheated oven for 10 minutes. Remove and cool slightly.
04 - In a large bowl, beat the cream cheese until smooth. Add Greek yogurt, granulated sugar, and lemon zest, mixing until incorporated. Add eggs one at a time, beating after each addition. Blend in vanilla extract.
05 - Pour the cheesecake mixture over the cooled baklava crust and tap the pan to remove any air bubbles.
06 - Return pan to the oven and bake for 45 minutes, or until slightly wobbly in the center but set. Leave in oven with the door ajar for 1 hour to cool gradually.
07 - Transfer cheesecake to the refrigerator and chill for at least 3 hours or overnight for optimal texture.
08 - In a small saucepan, combine honey, water, sugar, and lemon juice. Heat gently until sugar is dissolved, then simmer for 3 to 4 minutes. Remove from heat and allow to cool completely.
09 - When ready to serve, pour the cooled syrup over the chilled cheesecake and garnish with chopped pistachios.