Bucks fizz snowball tart
By Paul A Young From Saturday Kitchen Ingredients For the orange sweet pastry 160g/5½oz unsalted butter, softened 75g/2½oz unrefined caster sugar 1 orange, zest only 2 free-range egg yolks 250g/9oz plain flour For the filling and snowballs 450g/1lb white chocolate 120ml/4fl oz …