Whip the egg whites to make meringue.
Mix erythritol and matcha powder into the egg yolks.
Add almond flour and baking powder and mix well.
Fold the meringue into the batter and pour into a cake mold.
Bake at 180°C for 25 minutes in a preheated oven.
Mix Greek yogurt and matcha powder to make cream.
Spread the matcha cream on the cooled cake.