Prepare the filling: Beat cream cheese, sugar, vanilla, and salt until smooth. Add sour cream, lemon juice, and zest. Mix until creamy. Add eggs and mix just until combined. Strain through a sieve for extra smooth texture.
Prepare the crust: Line a 9 or 10-inch springform pan with parchment paper. Brush a sheet of phyllo with melted ghee and place into the pan, letting edges hang over. Repeat with 10 sheets, slightly rotating each layer. Sprinkle half of the nut mixture evenly.
Add 4 more buttered phyllo sheets, sprinkle remaining nuts, then layer 5 more sheets brushed with ghee.
Pour cheesecake filling into the crust. Gently scrunch the overhanging phyllo edges to create a rustic ruffled border.
Bake Baklava Cheesecake at 325°F for 60–70 minutes until the center slightly jiggles.
Make the syrup: Simmer sugar, water, and honey for 5–7 minutes until slightly thickened. Add lemon juice if desired.
Pour syrup mainly over the crisp phyllo edges immediately after baking. Cool completely, then refrigerate overnight before serving.
Notes
• Labneh gives a slightly tangier flavor than sour cream.