Mix jelly powder, 1/4 l water and apple juice in a pot. Let it swell for about 5 minutes. Stir in 75 g sugar and heat up at medium heat in a saucepan until everything is dissolved (must not boil).
Pour liquid jelly into a flat form and chill overnight. Wash, clean and halve the strawberries and mix with the remaining sugar. Remove the jelly from the edge of the mould with a sharp knife, hold it briefly in hot water and then turn it over.
Dice the jelly with a sharp knife and arrange on plates with the strawberries. Dust with icing sugar as desired, serve with a dash of crème fraîche and lemon balm leaves.