Preheat the oven to 220°C (428°F).
In a bowl, mix Greek yogurt, cream cheese, eggs, erythritol, and vanilla extract until well combined.
Sift in corn starch and mix into the batter.
Line the baking pan with parchment paper and pour in the batter.
Bake in the oven at 220°C for 25 minutes, then let it cool.
Let it set in the refrigerator for at least 3 hours before serving.