Preheat your oven to 300°F (150°C) and line a baking sheet with parchment paper.

In a blender or food processor, combine the cottage cheese, egg yolks, cornstarch, baking powder, salt, and optional sweetener. Blend until smooth.

In a clean mixing bowl, beat the egg whites with cream of tartar until stiff peaks form, about 3-5 minutes.

Carefully fold the whipped egg whites into the cottage cheese mixture in three batches.

Spoon the batter onto the prepared baking sheet, creating six evenly sized rounds.

Bake for about 25 minutes, until golden brown.

Let the cloud bread cool for about 5 minutes on the baking sheet before transferring to a wire rack.