Line and grease two sandwich tins
Preheat oven 190c
Whisk the sugar and eggs untill thick and fluffy
Fold in half of the flour untill it throughly mixed, then fold-in the other half of the flour.
Divide the mixture and half-fill the two prepared tins
Spread the jam on one of the sponge cake and place the other top.
Decorate with sifted icing sugar.
NOTE: The mixture can be steamed instead of baked