Preheat the oven to 300°F (150°C).

Prepare a baking sheet, covered with parchment paper and greased a little.

Separate the egg whites from the yolks.

Beat the whites until fluffy.

Add cream of tartar and beat until stiff.

Using an electric hand mixer, mix together egg yolks, erythritol, and cream cheese, until pale yellow and doubled in size.

Fold the whites into the yolk cream cheese mixture.

Use a spatula and do this gently.

Pour the batter onto the baking sheet, forming a rectangle shape.

Flatten out the batter, using a spatula.

Bake for approx.

35 minutes.

Don't over bake or the roll will break.

Take the baked batter out of the oven and fold it into a roll, together with the parchment paper.

Let it sit like that until it cools down.