Gluten and nut-free sponge:
50 g egg white
45 g caster sugar			
35 g egg yolk				
40 g gluten-free flour			
20 g butter					
Blueberry jelly jam:
75 g fresh or frozen blueberries
20 g caster sugar				
Lemon juice	
3 g corn starch				 
5 g gold gelatin			
Blueberry cream:
1 egg					 
20 g caster sugar				
50 g blueberry purée 
Lemon juice			
2 g gold gelatine	
25 g butter
Dark chocolate and blueberry mousse:
50 g Anglaise cream
55 g blueberry purée 
5 g gold gelatin	
120 g dark chocolate			
266 g whipped cream	
Tiffany blue glaze:
100 g whole milk
250 g thickened cream			
200 g caster sugar				
20 g glucose				     
20 g corn starch				 
10 g gold gelatin
2 g blue and green colouring    
Gluten and nut-free sponge:
Melt butter and keep at cool and melted temperature.
Whisk egg white and caster sugar until soft peak, then add the yolk.
Fold through the flour and last cold melted butter or butter if you want to replace it.
Put on the baking tray with a silicon paper to the size of your cake.
Bake at 180 C until golden brown.
Blueberry jelly jam:
Boil the purée and sugar.
Add the corn starch and lemon juice, boil for 1 minute.
Add strained, softened gelatine at last.
Pour warm on the sponge inside the cake ring.
Blueberry cream:
Boil the purée and juice, mix egg and sugar.
Boil for 1 minute until cooked and thick.
Add the strained softened gelatin, then mix the butter.
Put in your round mould or directly in your cake ring.
Pour over the jelly jam. 
Dark chocolate and blueberry mousse:
Mix warm Anglaise cream with softened gelatine to the hot melted chocolate and half the whipped cream.
Mix, then add remaining whipped cream and fold with a spatula.
Finish in the cake ring.
Let it set in your freezer before glazing.
Tiffany blue glaze:
Bring to a boil the milk, sugar, cream and glucose.
Thicken the mixture with the corn starch.
Add the softened gelatin.
Use a stick blender to smooth the mixture while putting the blue colouring.
Glaze at 28 C, pour over the frozen cake.
Credits: Celebrity Pastry Chef Pierrick Boyer
Photo Credits: Pierrick Boyer