Grease the bottom of the springform pan (26 cm Ø). Beat the eggs and 75 g sugar for about 8 minutes until frothy. Stir in the oil bit by bit. Mix pudding powder and baking powder, sieve on top and fold in. Spread the mixture into the mould.
Bake in the preheated oven (electric oven: 175 °C/circulating air: 150 °C/gas: level 2) for about 15 minutes.
Remove the cake base from the oven and immediately remove it from the edge of the springform pan with a knife. Place on a cake rack and allow to cool in the mould. Drain mandarins well in a sieve, catching the juice.
Place the cake base on a cake plate and enclose a cake ring firmly around it. Spread the mandarins evenly on the cake base.
1⁄4 l Measure the tangerine juice. Mix cake glaze powder and 2 tablespoons of sugar in a small pot. Stir in the juice bit by bit and bring to the boil while stirring. Distribute evenly over the mandarins from the middle.
Chill for about 30 minutes.
Whip the cream until stiff, adding cream firming agent and vanilla sugar. Spread the cream on the cake. Place the passion fruit nectar and sauce powder in a tall mixing bowl and whisk briefly with the whisk of the hand mixer, then whip at highest setting for approx. 2 minutes.
Spread lightly on the cream. Put in a cool place for about 3 hours. Remove the cake from the cake ring, cut into pieces and decorate with a few leaves of lemon balm.