Soak gelatine in plenty of cold water. Wash the limes in hot water and rub them dry. Grate or finely grate the peel of 2 limes. Squeeze both limes. Separate the eggs. Whisk the egg yolks, sugar and vanilla sugar with the whisk of the hand mixer for 3-5 minutes until thick and creamy. Stir in the juice and half the lime zest. Cover the rest of the zest and set aside
Squeeze out the gelatine and dissolve over a mild heat. Mix with 2-3 tbsp. egg yolk mass and stir into the whole egg yolk mass. Chill until the mixture becomes half firm. Beat egg whites and cream separately until stiff. Using a whisk, first whip the cream, then the beaten egg whites into the cream
Pour cream into glasses and chill for at least 3 hours. Cut 1/2 lime into slices. Decorate the cream just before serving with cranberries, slices of lime and shaved lime