Clean, wash and cut the rhubarb into pieces. Drain the apricots, collect the juice. Halve the apricot halves. Boil apricot and lemon juice, 75 g sugar and 1/4 litre water.
Steam the rhubarb for about 10 minutes. Stir cornstarch in 4 tablespoons of water until smooth, thicken compote with it. Stir in the apricots and let it cool down. In the meantime boil up the milk. Add remaining sugar, vanilla sugar and fat.
Stir in semolina, let it swell for about 5 minutes. Remove from heat, stir in the egg. Cut off the dumplings and cook in boiling water for about 7 minutes. Serve in portions with some compote. Add the rest.
Garnish with lemon balm strips and leaves.