Soak gelatine in cold water. Separate eggs. Put egg yolk, port wine, 1/8 litre water, lemon juice and 100 g sugar in a pot and mix. Beat with the whisk of the hand mixer at medium heat until foamy. Remove from the heat. Squeeze the gelatine and dissolve in the cream. Let it get cold in the fridge while stirring occasionally.
In the meantime, wash and clean the strawberries and, except for 4 pieces for decoration, halve or quarter them. Divide into 4 dessert glasses. Beat the egg whites until stiff. As soon as the port wine cream begins to set, carefully fold in the beaten egg white and spread on the strawberries. Moisten the rest of the strawberries and roll them in remaining sugar. Serve dessert decorated with lemon peel strips, sugared strawberries and lemon balm