01 - Preheat oven to 325°F. Line the bottom of a 9-inch springform pan with parchment paper.
02 - Pulse chocolate sandwich cookies in a food processor until finely crushed. Combine with melted butter and press firmly into the bottom of the prepared pan. Bake for 10 minutes, then cool slightly.
03 - In a large bowl, beat cream cheese and sugar until completely smooth. Add eggs one at a time, mixing thoroughly after each addition. Blend in sour cream and vanilla extract.
04 - Whisk strawberry puree with cornstarch until smooth, then gently fold into the cream cheese batter until evenly incorporated.
05 - Pour filling over the cooled crust and smooth the top. Bake for 50-60 minutes until the center is just set with a slight wobble. Turn off oven, crack door open, and let cool inside for 1 hour.
06 - Remove from oven and run a thin knife around the edge to loosen. Cool to room temperature, then refrigerate for at least 4 hours or preferably overnight.
07 - Heat heavy cream until just simmering, pour over chopped semisweet chocolate, and let sit for 2 minutes. Stir until completely smooth. Cool slightly before spreading.
08 - Spread ganache evenly over chilled cheesecake. Top with fresh strawberry halves. Drizzle with melted dark chocolate if desired. Chill for 30 minutes before slicing.