Prepare the Crust: Preheat oven to 325°F (160°C). Combine graham crumbs, melted butter, and honey. Press into a greased 9-inch springform pan. Bake 8 minutes; cool slightly.
Make Baklava Layer: Mix pistachios, walnuts, and cinnamon. Brush a sheet of phyllo with melted butter, lay over crust, sprinkle nut mixture. Repeat 5–6 layers.
Prepare Cheesecake Filling: Beat cream cheese and sugar until smooth. Add eggs one at a time. Mix in sour cream, vanilla, and honey. Pour over baklava layer.
Bake: Place pan in a water bath; bake 60–70 minutes until set but slightly jiggly. Cool 1 hour in oven with door ajar.
Make Honey Syrup: Simmer honey, sugar, water, lemon juice, and cinnamon stick 5–7 minutes until slightly thickened. Cool.
Assemble & Serve: Once cheesecake cools, remove from pan. Drizzle with honey syrup, sprinkle with chopped pistachios, and chill at least 4 hours (overnight is best).