Make the Dough: Mix flour, powdered sugar, baking powder, and salt. Add cold butter and rub into crumbs. Add yolk and ice water, knead quickly, and refrigerate for 30 minutes.
Prepare the Filling: Whisk together cream cheese, cream, eggs, sugar, vanilla, and starch until smooth.
Roll and Bake: Roll out dough to 6 mm thickness. Line a 23 cm baking dish with it. Bake at 180°C (convection) for 15 minutes.
Assemble and Bake: Add blueberries to the crust, pour in the filling, and bake at 175°C (convection) for 40-45 minutes until golden.
