Recipe: Continental dream cheese slice

G'day Janice, I don't really think this is IT, but without the sultanas it may be close. I thought Gabriel Gate may have had something in his 'French cuisine for Australians', but no luck. In the meantime, I shall keep on looking. (The poor old finger gets more prune like every day). LOL.
I do know the slice you are after, I have had them, they are about the yummiest going, and they are certainly better than the vanilla squares. I am coming to the conclusion that this is one of those 'trade secrets'.
Regards from Angel. (\0/)

Continental Cream Cheese Slice.

Pastry~~
1 1/2 cups flour
1/2 cup custard powder
4 dessertspoons icing sugar
1/2 teaspoon baking powder
125g butter
milk

Filling~~
300g cream cheese
60g butter
2 eggs
1/4 cup sugar
60g sultanas
grated rind of 1 lemon
2 dessertspoons of lemon juice

Pastry~~
Sift into basin the flour, custard powder, icing sugar and baking powder. Rub in the butter, add sufficient milk to make a stiff dough ( approximately 4 to 6 dessertspoons milk).
Roll out 2/3 of the pastry and line a greased lamington tin, bringing the pastry 1.5cm up the sides. Prick the base and bake in a moderate over for 10 minutes; cool.

Filling~~
Cream butter with the cream cheese until soft and creamy. Beat eggs and sugar until light and fluffy.
Gradually add to the cream cheese mixture, then beat until smooth. Fold in sultanas, lemon rind and juice.
Smooth filling over cooked pastry base. Cut remaining pastry into long strips and place diagonally over filling, lattice fashion.*
Brush pastry with milk. Bake in a moderate oven (180*C) 35 to 45 minutes; while still warm. cut into slices; leave in tin until cool, then refrigerate.

* You could make a tad more pastry and put a solid top on the filling instead of the lattice, then ice and usual.