Bring the mandarin pulp, lemon zest and inverted sugar to the boil. Cut the orange segments into 1cm pieces and add to the mixture. Incorporate the gelatin mass. store at +4°C / 39.2°F before assembling.
Heat the milk and mix in the sugar and melted gelatin mass. add the hazelnut paste and mix well until smooth. At 27°C / 80.6°F delicately fold the frothy, whipped cream into the 1st mixture. Assemble.
Heat 1/3 of each pulp and mix into the melted gelatin mass then add the rest of the pulp. Whip the cream until frothy. At the same time, make a meringue with the egg whites at room temperature, dextrose and atomised glucose. Fold the meringue (40°C / 104°F) into the 1st mixture (35°C / 95°F) followed by the whipped cream. Assemble.
Mix all the ingredients with a flat whisk. Pass the mixture through the Koma sieve then sprinkle the crumble onto a silpain baking sheet. Bake at 145°C / 293°F during 25 min. Keep in a dry place.
Place alternate layers of hazelnut supreme, pulp and mandarin mousse into a verrine.
Hazelnut crumble dusted with a light coating of icing sugar. Chocolate decorations.