150g/5Β½oz fresh blueberries
3 unwaxed lemons, finely grated zest from 2 lemons and juice from 3 lemons
200g/7oz plain flour
2Β½ tsp baking powder
175g/6oz caster sugar
50²µ/1ΒΎ΄Η³ϊ ground almonds
pinch salt
4 tbsp granulated sugar
200g/7oz unsalted butter, softened, plus extra for greasing
3 free-range eggs, lightly beaten
2 tbsp milk