Rinse and stem the berries, put into a saucepan, add 2 cups of water, cover and stew in oven at 250
oF (100-120
oC)
Sieve stewed berries, add 3 cups of hot water, bring to the boil.
Dissolve the starch in a cup of cold water, stir until dissolved completely. Gradually add the starch to the mixture, stirring all the time.
Bring to the boil, pour out to glasses or bowls, leave to cool.
When serving top with leaves of mellissa.