For the base, knead 125 g fat, 75 g sugar, flour and 1 egg into a smooth dough. Cover and chill for about 30 minutes. Finely dice the marzipan, chop the almonds coarsely. Mix both with the pistachios
Separate 4 eggs. Cream 125 g fat and 175 g sugar. Add quark, egg yolk, semolina and orange juice and stir in. Beat the egg white until stiff and fold in
Roll out the dough on a little flour until round (approx. 28 cm Ø). Put it into a greased springform pan (26 cm Ø) and press it up a little at the edges. Prick the base several times. Pour in almond mixture. Peel and slice oranges and place them vertically on the edge of the tin. Pour in quark mixture
Bake the cake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for 1-11/4 hours. Cover after 30-40 minutes if necessary. Let it cool down. Dust with icing sugar. Decorate with orange if necessary.