Defrost the spinach, squeeze the liquid. Chop the chocolate and melt over a warm water bath. Roughly chop the spinach with a knife. Finely puree the spinach and oil in the universal chopper in portions. Stir in the lemon zest and juice of 1 lemon. Whisk eggs, sugar and vanilla sugar with the whisk of the hand mixer until thick and creamy. Mix flour and baking powder. Add the vegetable puree and flour alternately to the egg mixture and work into a smooth dough. Fold in melted chocolate
Grease a ring cake tin (2 litres capacity) and dust with flour. Pour in the dough. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 1 hour. Let the finished cake rest in the pan for about 10 minutes. Turn out onto a cake rack and let it cool down. Sift icing sugar into a bowl. Add 4-5 tablespoons lemon juice. Mix with the whisks of the hand mixer to a smooth, thick glaze. Spread the icing on the cake
Decorate the icing with lemon zests
waiting time approx. 3 hours