Crush chocolate cookies, mix with melted butter, press into a lined springform pan, chill 20 minutes.
Cook raspberries, sugar, and lemon juice for 8–10 minutes, blend smooth, strain seeds, cool.
Melt dark chocolate using double boiler or microwave, cool slightly.
Beat cream cheese and sugar smooth, mix in eggs, egg yolk, cream, vanilla, salt, then fold in melted chocolate.
Pour half batter over crust, add raspberry sauce, cover with remaining batter, swirl more sauce on top.
Bake at 160°C (320°F) for 60–70 minutes until edges set and center slightly jiggly; cool in oven 1 hour.
Chill in refrigerator at least 4 hours or overnight, garnish before serving.