Line fairy cake trays with the paper cases. Sift together the flour, baking powder and salt. In a large bowl, mix the yogurt, eggs, sugar and butter using a large spoon. Add the flour mixture, berries, vanilla and lemon zest. Stir until combined, but do not over-mix. Divide between the cases and
To make the topping, beat together the cream cheese and icing sugar. Add enough food colour to make a pale lilac. Divide the cream cheese between the cakes.
For the decoration, place the blueberries in a pan with the sugar, lemon juice and
(If you do not wish to poach the blueberries and drizzle over the syrup, then simply top each cake with a few uncooked blueberries.)