Combine eggs and sugar gradually beating continously. Sprinkle a dash of salt. Add the flour and baking powder;mix it well. Flavor with vanilla. Spread the mixture into a heavily paper-lined cookie sheet levelling it 1cm. Bake at 180°C for 10-12 minutes.

Loosen edges and immediately turn upside down on a towel sprinkled with icing sugar. Carefully remove paper. Trim off any stiff edges by using scissors. While cake is still hot, roll it in towel sprinkled with icing sugar. Cool. Unroll again. Spread the sweet cranberry relish and roll. Cut into 1 inch slices. Put and line in a round serving bowl. Pour-in the pastry cream with whipping cream, spreading evenly. Cover with cling wrap and refrigerate for at least 4 to 5 hours.

Sweet Canberry Relish: Blend cranberries in a blender. Combine blended cranberries and other ingredients in a bowl. Mix well until well incorporated.

Pastry Cream: Whisk egg yolks, sugar and flour; pour in part of the milk in order to obtain a smooth cream; add grated lemon peel, salt and the remaining milk very slowly. Cook over moderate heat and keep mixing until thickened. Refrigerate for 30 minutes. Meanwhile, beat the whipping cream gradually. Combine the whipping cream in the cooled pastry cream and keep mixing until well blended.