Soak gelatine in cold water. Mix buttermilk, lemon juice and vanillin sugar. Squeeze the gelatine, dissolve over a mild heat and stir into the buttermilk. Pour buttermilk into 4 bowls and allow to set.
Cleaning, washing and stoning cherries. Simmer juice, except for 2 tablespoons, cinnamon stick, cherries and sugar for about 5 minutes. Stir the rest of the juice and starch until smooth, add to the cherries and bring to the boil while stirring.
Let the compote cool down and pour over the butter milk dish. Decorate with lemon balm.