Peel the beetroot, grate it finely (caution, it stains strongly! Wear disposable gloves), mix with 1 pinch of salt and sugar.
Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Grease a square springform pan (24 x 24 cm). Chop the chocolate and melt in a hot water bath. Coarsely chop the almonds. Mix flour, baking powder and cocoa. Beat the eggs, 1 pinch of salt and 350 g sugar until thick and creamy. Stir oil first, then chocolate into the egg cream. Squeeze the beetroot in a sieve, collect the juice. Stir in the flour mixture, grated beetroot and milk briefly. Fold in about 3⁄4 of the almonds. Smooth the dough in the form. Bake in the oven for about 35 minutes. Let it cool down.
Halve the pomegranate and remove the seeds. Stir icing sugar and 4-5 tablespoons beetroot juice until smooth. Spread the icing on the cake. Sprinkle with pomegranate seeds and the rest almonds. Let it dry.