Sieve the flour banking powder sugar and salt together

Add margarine and vegetable fat

Rub in to a sady texture

Make a well in the center

Add 8spoon of water

Handle as little and as lightly as possible

Roll out the pastry into a rectangle shape 30*16 cm

Spread with jam leaving 1cm clear on all edges

Fold over two short sides 1cm roll the pastry from the top

Moisten the bottom edges to seal the roll

Place edges down on a greased baking sheet

Brush with eggwash sprinkle with sugar

Bake in a moderate oven at 200℃for about 40min