1/ Combine all the ingredients and bake for 12 minutes at 160°C.
2/ Combine drained gelatin with milk and add to melted chocolate. Add whipped cream.
3/ Make a syrup with sugar and water. Add nuts and combine until crumbly.
4/ Make custard (milk, yolks, sugar). Add drained gelatin and walnut liqueur. Leave to cool then add whipped cream.
5/ Whisk egg whites and sugar. Add yolks, flour and ground walnuts. Shape into 4 discs (8-10cm in diameter) and bake for 10 minutes at 180°C.
6/ Combine sugar and flour before adding egg whites, walnuts and melted butter. Bake for 8 minutes at 180°C.
7/ Layer each item starting with the biscuit and ending with the walnut crunch and crumble topping.
By Chef François Kartheiser