I last baked this with my sister H, many years ago.
Set oven to 190C or Gas Mark 5 (see, no fan temperature so, must be old!)
Make pastry using 4oz margarine, 7oz plain flour, a pinch of salt and a enough tablespoons of cold water to bring together. Roll it out and use to line a shallow 7" flan/pie dish. Put into the fridge to chill.
In a bowl, mix 8oz SIEVED cottage cheese, or 8oz cream cheese, with 1 beaten egg, 5fl oz milk and 1 1/2 oz sugar. Add the zest of one lemon, 4oz currants and 2oz melted butter.
Pour into the chilled pastry case and bake in the oven. Recipe says 30 minutes but mine took nearly 45 minutes.... It needs to be just about set in the middle when you wobble it and just light brown.
Remove from oven and leave to go cold in the flan/pie.
Here it is, cooled: