Sponge roll

Note: These recipes use NZ measurements. 1 c = 1 cup = 250 ml. 1 T = 1 tablespoon = 15 ml. 1 D = 2 teaspoons. 1 t = 1 teaspoon = 5ml. If you're in America, you may find you need a little extra baking powder in recipes that use it.

3 eggs
3oz castor sugar
1 1/2oz cornflour
1/2 t baking powder
Pinch salt

Beat egg whites with salt until stiff. Add yolks and sugar and beat until thick and creamy and sugar is dissolved. Fold in sifted dry ingredients. Have ready a sponge roll tin buttered and floured. Pour in batter and spread evenly. Bake 14 minutes at 200C. Turn out on a dry cloth. Spread with boiling jam. Roll in cloth and leave until cold.

very good

Source: Rally cook book, page 47