Separate eggs. Cream fat, 100 g sugar and lemon peel. Stir in the egg yolks one by one. Mix flour and baking powder and stir in alternately with the milk. Spread the dough into a greased springform pan (26 cm Ø). Beat the egg white and 1 pinch of salt until stiff.
While continuing to beat, add 150 g sugar. Keep beating until the sugar is completely dissolved. Pour approx. 3 tablespoons into a piping bag with a small star-shaped spout and spray Christmas trees onto a baking tray lined with baking paper. Spread the rest of the meringue loosely on the sponge mixture, leaving about 1 cm of sponge rim free. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 35 minutes. Take out and let cool down. Dry fir trees in the oven at 50 °C for approx. 2 hours. Soak gelatine in cold water. Whip the cream until stiff, adding 75 g sugar. Squeeze the gelatine. Warm 3 tablespoons of sparkling wine lukewarm, dissolve gelatine in it. Stir the rest of the champagne into the mixture.
Soak gelatine in cold water. Whip the cream until stiff, adding 75 g sugar. Squeeze the gelatine. Warm 3 tablespoons of sparkling wine lukewarm, dissolve gelatine in it. Stir the rest of the champagne into the mixture. Allow to draw a little, fold in the cream. Spread on the meringue cake and let it get completely firm. Serve the cake decorated with meringue fir trees and silver pearls