Blueberry Tea Cake Rolls

A soft spongy cake roll prepared with eggs, sugar, flour and ceylon tea bags with a delightful blueberry flavour. Those cake slices taste very nice on its own, but they can be served with whipped cream, or ice cream.

Yolk Batter	Meringue
4 Large egg yolks 30 g Maple syrup 50 g Vegetable oil 50 g Milk 90 g Cake flour 9 g Blueberry tea (about 3 tea bags) 2 g Baking powder	5 Large egg whites Pinch of salt 1/2 tsp Lemon juice 100 g Caster sugar

1. Line a 30x40-cm baking tray with parchment paper. Preheat oven to 190C/375F. Beat the egg yolks, maple syrup, vegetable oil and milk until thoroughly blended. Whisk together the cake flour, blueberry tea, and baking powder. Sift the flour mixture into the yolk mixture. Fold to combine.
   
2. Beat egg whites with salt and lemon juice over low speed until frothy and foamy. Gradually add in sugar, increase speed and beat until stiff but not dry. Carefully fold 1/3 of egg white mixture into yolk mixture to lighten it and then carefully fold in remaining whites.
   
3. Pour the cake batter into the prepared baking tray and smooth the top. Transfer to the oven and bake for 12 minutes. Remove from the oven and invert onto a sheet of baking paper dusted with icing sugar. Carefully peel off the the paper liner and trim the edges of cake. Roll up from the short side.