Preheat oven to 300°F (150°C) and line a tray with parchment paper

Blend cottage cheese until smooth and creamy

Beat egg whites with cream of tartar until stiff peaks form

In another bowl, mix egg yolks, cottage cheese, cornstarch, and sweetener

Gently fold egg whites into yolk mixture to keep it airy

Fold in blueberries carefully

Spoon mixture into small rounds on baking tray

Bake for 25–30 minutes until golden on top

Let cool slightly before serving