Directions
1Preheat the oven to 165 degrees.
2Beat the egg whites until frothy.
3Gradually add sugar and continue beating until soft peaks form.
4Add the egg yolks one at a time, stirring well after each.
5Sift the cornstarch, the flour and baking powder separately, together in a bowl.
6Add to the mix. Mix well.
7Pour the mixture into a rectangular tin (50x30 cm) shallow, greased and floured.
8Bake for 15 minutes or until lightly browned.
9Remove from the oven, put the pan on a wet wipe, wrap and let it 10 minutes.
10Unpack, cutting edges, to extend over the entire surface jam.
11Roll again and sprinkle top with powdered sugar.