Prepare the Cheesecake Batter
Preheat the oven to 325°F (163°C).
In a large mixing bowl, beat the cream cheese and sugar until smooth. Add eggs one at a time, beating after each addition. Mix in Greek yogurt, vanilla extract, and cinnamon until combined.
Prepare the Baklava Layers
Grease a 9-inch springform pan. Layer 5 sheets of phyllo dough in the pan, brushing each with melted butter. Trim any excess dough. Sprinkle half of the pistachios and walnuts over the top.
Add another 5 layers of phyllo dough, brushing each with butter, and sprinkle the remaining nuts.
Assemble the Cheesecake
Pour the cheesecake batter over the prepared phyllo and nut layers. Smooth the top with a spatula.
Bake the Cheesecake
Place the springform pan in a water bath (a larger pan filled with 1 inch of hot water). Bake for 60-70 minutes, or until the center is just set. Turn off the oven and let the cheesecake cool inside for 1 hour.
Prepare the Honey Syrup
While the cheesecake cools, combine honey, water, sugar, lemon juice, and the cinnamon stick in a saucepan. Simmer for 10 minutes, then remove the cinnamon stick and let it cool.
Chill and Finish
Refrigerate the cheesecake for at least 3 hours or overnight. Once chilled, pour the cooled honey syrup over the top and garnish with chopped pistachios and a drizzle of honey.
Serve
Slice and serve this decadent dessert with extra syrup on the side if desired.