Mix the egg yolk with sugar andvanilla for 4-5 minutes until pale.
Stir in the butter and mix well then add the flour, salt and baking powder and mix into a paste.
Place the paste between two sheets of baking paper then roll it into a 0.5cm thick sheet.
Place in the freezer for 10 minutes then cut out an 18cm disc using a metal cake ring – keep the cake rind around the sable disc as it helps with the baking.
Remove the excess dough and bake the sable Breton in the preheated oven at 350°F for 15-17 minutes until golden brown and slightly crisp.
Allow to cool in the pan then place the baked sable dough in a cake ring lined with acetate sheets.
Place aside.
Kalamansi curd:
Bloom the gelatin in cold water.
Heat the kalamansi juice in a saucepan.
In a bowl, mix the sugar and eggs until pale. Pour gradually the hot kalamansi juice and mix well then return the mixture back on heat and cook until it reaches 82°C.
Remove from heat and stir in the gelatin.
Allow to cool to 40°C then add the butter and emulsify with a hand blender. Place aside until needed.
Flourless chocolate sponge cake:
Melt the chocolate with the butter in a bowl over a hot water bath. Remove off heat and allow to cool down slightly then stir in the egg yolk.
Mix the egg whites with the salt until fluffy then gradually stir in the sugar and mix until glossy and firm.
Incorporate the meringue into the melted chocolate mixture then pour the batter in an 18cm pan lined with baking paper.
Bake in the preheated oven at 350°F for 15 minutes then allow to cool completely.
Ginger ganache:
Heat the cream, ginger and sugar in a saucepan until the boiling point.
Pour the cream over the chocolate and mix until smooth and creamy.
Pour the ganache over the sable Breton in the cake ring and place in the fridge.
Chocolate croustillant:
Mix the melted chocolate with oil then stir in the paillete feuilletine.
Spread the mixture in an 18cm Ø pan and place in the freezer to set.
Once set, arrange the croustillant over the ganache then pour the kalamansi curd over it. Finish with the final layer – the flourless chocolate sponge cake.
Place these layers in the freezer for a few hours.
Chocolate mousse:
Bloom the gelatin in cold water.
Heat the milk in a small pot.
Mix the egg yolks with sugar and salt for 2-3 minutes. Pour in the hot milk, mixing all the time, then transfer the mixture back on low heat.
Cook until it reaches 82°C then remove from heat and stir in the gelatin.
Pour the mixture over the chocolate and mix until smooth.
Allow to come to room temperatures then fold in the whipped cream.
Prepare a 20 or 22cm Ø cake ring by lining it with acetate sheets.
Remove the frozen layers from the fridge and place them in the center of the 20/22cm Ø cake ring.
Pour the chocolate mousse around those layers then cover them with mousse.
Be careful as the mousse might spill at the bottom of the cake ring if it’s not properly sealed.
Place the cake in the freezer for a few hours.
Chocolate glaze:
Bloom the gelatin in cold water.
Heat the cream in a saucepan.
Remove from heat and stir in gelatin. Mix well then pour over the chocolate and mix well.
Allow to cool down slightly.
Remove the cake from the freezer and place it on a cooling rack.
Evenly pour the glaze over the cake and allow to set.