Fish and Mushroom Pirozhki

Pastry

• 300 g (10½ oz/2⅓ cups) plain (all-purpose) flour
• 175

1. To make the pastry, sift the flour with a generous pinch of salt into a large bowl. Rub the butter into the flour until fine crumbs form. Lightly beat 2 of the egg yolks and Stir into the flour mixture with a little chilled water. Mix together, adding more water if necessary to bring the dough together. Cover the dough with plastic wrap and refrigerate f