Bake in the oven at 230°C for 15-25 minutes.
Preheat the oven to 220°C.
Combine Greek yogurt, cream cheese, and sugar substitute in a bowl and mix until smooth.
Add eggs one at a time, mixing well after each addition.
Sift cornstarch and add to the mixture, stirring well.
Add vanilla extract and lemon juice, and mix evenly.
Pour the batter into a pan lined with parchment paper.
Bake at 220°C for 25-30 minutes.
Let it cool completely, then refrigerate for at least 4 hours.