Defrost the raspberries. Soak gelatine in cold water. Heat the juice of 1/2 lemon with a tablespoon of honey and 3 tablespoons of sugar until the sugar is dissolved. Squeeze the gelatine and dissolve in the warm lemon juice. Stir in 3 tablespoons of buttermilk. Stir the gelatine mixture into the remaining buttermilk. Chill until the mass begins to gel.
Whip cream until stiff and fold in. Put 4 beautiful raspberries aside for decoration. Puree 3 tablespoons sugar, 1 tablespoon honey, icing sugar, juice of 1/2 lemon and raspberries with a blender. Marble the raspberry sauce with the cream. Pour into 4 glasses and chill for about 2 hours. Decorate the cream with raspberries and lemon zests