Wash and clean the strawberries. Drain the peaches and cherries each on a sieve. Cut the peaches into pieces. Mix fruit and sugar and pour into a glass. Leave to stand for about 30 minutes.
Cut the vanilla pod in half, cut lengthwise and add to the fruit. Pour rum over it so that it stands at least 1 cm above the fruits. Close the jar and let it stand for about 2 weeks in a cool, dark place. Stir occasionally so that all the sugar dissolves. Serve rum pot possibly with an ice ball on a plate and decorated with lemon balm (variation)