Prepare CHOCOLATE COOKIE CRUST.
Increase oven temperature to 400°F.
Beat cream cheese, sugar, flour and pumpkin pie spice in large bowl until well blended.
Add pumpkin and eggs; beat until well blended.
Stir in small chocolate chips; pour batter into prepared crust.
Bake 10 minutes.
Reduce oven temperature to 250°F; continue baking 60 minutes or until almost set.
Remove from oven to wire rack.
With knife, loosen cake from side of pan.
Cool completely; remove side of pan.
Refrigerate about 5 hours before serving.
Prepare and garnish with CHOCOLATE LEAVES, if desired.
Cover; refrigerate leftover cheesecake.