Wash beetroot thoroughly and cook in boiling salted water for about 20 minutes. Meanwhile grate cheese. Cut ham into fine cubes. Mix eggs, 100 g sour cream and oil, season with salt and pepper.
Stir in the cheese. Mix flour and baking powder and stir in. Fold in ham. Wash the apples and remove the cores with a core cutter.
Drain, quench and peel the beetroot. Pour the dough into a greased springform pan (26 cm Ø), dust with flour. Press 4 apples and 4 beetroot alternately in a circle into the dough, press 1 beetroot in the middle and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see
manufacturer) bake for 40-50 minutes (chopstick sample).
Grate 1 apple. Mix cream cheese, grated apple, horseradish and 50 g sour cream, season with salt and pepper. Put the dip in a cool place. Take the cake out of the oven and let it cool down lukewarm on a cake rack.
Add dip.