100 g of potato starch, 100 g of flour, 2 eggs, 200 g of sugar icing, 200 g of butter, 1 untreated lemon, 1 and a half sachets of baking powder, salt, on a shelf for
flattening,
sift
the potato starch and flour, in the meantime add the yeast and a pinch of salt Separately, froth the butter with the sugar
by incorporating the egg yolks, continuing to mix with the whisk (always from the bottom upwards) once everything has been whipped with froth, pour little by little (always stirring with a whisk) the flour mixture and the grated lemon zest. Whip the egg whites until stiff peaks, and add them gently to the mixture
without disassembling it. Pour the dough into a greased and floured cake pan, bake for half an hour at 180 degrees, after cooking, a sprinkle of icing sugar and .... good snack!