Clean and wash the rhubarb. Cut into approx. 10 cm long diagonal pieces. Heat jelly, 2 tbsp lemon juice and 3-4 tbsp water in a pot. Steam rhubarb in it for 6-8 minutes at low heat. Let the rhubarb cool down a little. Pour onto four portion plates and let cool off
Mix eggs, sugar, port wine, starch, 2 tablespoons lemon juice and zest in a high pot. Shortly before serving, beat the sauce at medium heat until frothy. It is good when it rises in the pot and becomes thick
Pour hot sauce over the rhubarb. Dust with cinnamon and icing sugar. Decorate if necessary