

Preheat oven to 190 C (medium heat)
Beat the egg whites well, with a pinch of salt, until hard peaks are formed
Mix the egg yolks, sugar, oil, vanilla with electric mixer until creamy
Mix baking powder in yolks mixture
Put the yolks into egg whites and fold with a spatula with care not to flatten the composition
Add sifted flour and mix in the same way
Pour batter in pan and spread it evenly
Sprinkle a tablespoon of flour over cherries and stir
Put the cherries in the pan, evenly
Bake 25 minutes or until the sponge is cooked
Remove to a rack and sprinkle with vanilla sugar. Wait until is cooled (if you can)