(Originally from Evelyn Rose’s “Complete International Jewish Cookbook”, ISBN 1861057326.)
This is enough for a 20 cm tin, about 5 cm deep. Mix 175 g self-raising flour (or plain flour with 1½ tsp baking powder), 125 g butter, 50 g icing sugar, 1 egg yolk, and 1 tbsp water, until the ingredients form a dough of a suitable texture. Chill for 30 minutes, then roll out on a floured board to fit your desired tin. Return to the fridge while you prepare the filling.
Separate 2 eggs. Beat the yolks with 450 g curd cheese, ½ teaspoon vanilla, juice and rind of half a lemon, 50 g melted butter, 50 g caster sugar, 2 level tbsp cornflour, and 150 ml soured cream, until smooth and thick. Whisk the whites to stiff peaks, then whisk in an additional 2 tsp caster sugar. Fold the whites into the cheese mixture, then fill the prepared pastry. Ensure the top is smooth and level.