Whisk the room temperature cream cheese in a small bowl until smooth.
Stir in the Greek yogurt, sweetener, vanilla extract, cinnamon, and salt. Mix until silky.
Add the egg white and whisk again until everything is fully combined.
Spray a small ramekin with nonstick cooking spray. Pour in the cheesecake mixture.
Microwave for 45-60 seconds, stopping as soon as the center is just set.
Let it cool before enjoying.