Preheat oven to 325°F.
In a large bowl, beat the cream cheese until smooth.
Add the Greek yogurt, eggs, sweetener, and vanilla extract. Beat until well combined.
Fold in the chopped pistachios.
Pour the batter into a springform pan.
Bake for 45-55 minutes, until the center is almost set.
Allow to cool completely before removing from the pan.
Refrigerate for at least 4 hours before serving.
