Bring milk, 1 pinch of salt and lemon zest to the boil. Sprinkle in semolina while stirring. Let it swell for about 5 minutes at low heat. Stir in sugar. Take the pot off the stove
Beat the egg white and 1 pinch of salt until stiff. Fold the beaten egg white into the hot semolina. Let the flummery cool down if necessary
Drain the cherries, collect the juice. Stir starch and 3 tbsp. juice until smooth. Boil up the rest of the juice and cinnamon. Stir in the starch, bring to the boil and simmer for about 1 minute while stirring. Fold in cherries. Let the compote cool down if necessary. Remove cinnamon stick
Arrange flummery and compote. Decorate with lemon balm and sprinkle with cinnamon
For the semolina flummery you can now serve rhubarb compote instead of cherry. A little banana reduces the acidity and saves sugar