In medium microwavable bowl, microwave chocolate chips and 3/4 cup whipping cream uncovered on High 1 minute; stir. Microwave 30 seconds; stir until smooth. Spread mixture on top of cheesecake layer. Refrigerate about 4 hours or until cooled completely. Cut into 6 rows by 4 rows. Sprinkle sea salt on top of chocolate layer before serving, if desired.