Step #1 Grease & flour two 8" sponge sandwich tins.
Step #2 Set oven to 350'C/180'F.
Step #3 Beat egg whites until stiff in large bowl of electric mixer.
Step #4 Slowly add in sugar while beating & continue beating until the sugar is dissolved.
Step #5 Add egg yolks one at a time & beat until mixture is evenly coloured right through.
Step #6 Sift the dry ingedients together & lightly fold through using a metal spoon.
Step #7 Add hot water & lemon juice & fold in lightly.
Step #8 Pour evenly into the prepared tins & bake for 20 mins or until cake springs back when lightly touched with finger.
Step #9 Remove from oven & leave in tins for about 5 mins, then turn out onto a rack to cool completely.
Step #10 When cold join together with sweetened whipped cream & dust with icing sugar.
Step #11 *To make more special spread top this with a thin layer of lemon icing/frosting & decorate with rosettes of whipped cream & pieces of preserved ginger.