Wash the oranges thoroughly. Rub the peel of 1 orange. Cut 2 oranges in half. Remove the pulp, squeeze it and pour it through a sieve. Soak gelatine in cold water. Separate the eggs. Beat the egg yolks, sugar and vanilla sugar with the whisk of the hand mixer until frothy.
Stir orange zest, orange juice and liqueur into the egg cream. Squeeze the gelatine, dissolve and stir in. Whip cream and egg whites separately until stiff and fold into the orange cream with the whisk. Allow the cream to thicken a little. Pour into a piping bag with a star-shaped spout and squirt into the orange halves. Leave to set in the fridge. Decorate with chocolate rolls and orange zests
1 1/4 hours waiting time