Prepare the loaf pan, cut the fruit into small pieces, soak the gelatine leaves in cold water, preheat the oven to 250 °.
Make a firm snow out of egg white and granulated sugar, fold in the yolk and flour and spread on baking paper. Bake quickly to golden brown for 5-7 minutes. Fall onto a floured piece of paper, peel off the baked-on paper, let it cool down and line the mold with it, leaving a strip to cover.
Stir the curd cheese, icing sugar, vanilla sugar and grated lemon zest until smooth and mix with the whipped cream. Let the well-squeezed gelatin melt in the warmed rum, stir into the cream and fold in the fruits, fill the mold tightly and put on the biscuit strips.
Chill for 2-3 hours, then cut into slices and garnish.