01 - Preheat oven to 340°F (170°C). Grease and line a 9-inch springform pan.
02 - Layer 6 sheets of phyllo dough in the pan, brushing each sheet with melted butter. Combine pistachios, walnuts, sugar, and cinnamon, then sprinkle half of this mixture over the layered phyllo.
03 - Layer the remaining 6 phyllo sheets, brushing each with butter. Spread the rest of the nut mixture evenly over top and press lightly.
04 - Bake the baklava crust for 10 minutes. Remove from oven and allow to cool slightly.
05 - Beat cream cheese until smooth. Mix in Greek yogurt, sugar, and lemon zest until fully combined. Add eggs one at a time, mixing well after each addition. Blend in vanilla extract.
06 - Pour the cheesecake mixture over the cooled baklava crust. Tap the pan to remove air bubbles. Bake at 340°F (170°C) for 45 minutes, or until the center is set but still slightly wobbly.
07 - Switch off the oven, open the door slightly, and let the cheesecake cool inside the oven for 1 hour.
08 - Transfer to refrigerator and chill for at least 3 hours or overnight for best texture.
09 - Combine honey, water, sugar, and lemon juice in a saucepan. Warm gently until sugar dissolves, then simmer for 3 to 4 minutes. Let cool.
10 - Pour the cooled syrup over the chilled cheesecake before serving. Scatter with chopped pistachios for garnish.