For the cream slices, prepare the sponge dough according to the recipe and let it cool.
Meanwhile, prepare the vanilla top cream. Whip the whole eggs with sugar and vanilla over haze until warm, then lift away from the haze and whip until cooled. Mix in the gelatin sheets softened in cold water and warmed with 2 tablespoons of water. Fold well cooled whipped cream into the mixture.
Cut the sponge dough into strips about 8 cm wide. Spread one sheet with half of the cream, place the second sheet on top and spread with the remaining cream, and place the top sheet on top, bottom side up, and sugar over. Chill the cream slices in the refrigerator.
After the cream slices have completely set in the refrigerator, cut into portions.