Cream butter, salt, sugar, vanilla and hazelnut paste in a mixer with a paddle attachment. Add the fresh eggs and dry mix without mixing too much. Roll the puff pastry between 2 silicone mats. Make a 1x1x1-cm cube for the final garnish. Bake at 165 degrees Celsius for 12 to 15 minutes.
Cream the butter, salt, sugar, vanilla and hazelnut paste in a mixer with a paddle attachment. Add egg yolk to the mix together with pastry flour and hazelnut meal and chunks of natural processed Kerinci Kayu Aro Arabica coffee grind. In another mixer, whisk egg whites with coconut sugar until they reach a soft peak consistency. Fold the meringue into the previous mix with a spatula. Do not overmix or the cake will collapse after baking. Bake at 175 degrees Celsius for 15 to 16 minutes.
Roast the raw hazelnuts at 150 degrees Celsius for 20 minutes. Prepare a cara - mel. Mix in salt and toasted hazelnuts until coated. Grind in a thermomix until you reach liquid consistency. Put it in a dome mold each 5 grams.
Roast the raw hazelnuts at 150 degrees Celsius for 20 minutes. Cook the sugar until you reach 119 degrees Celsius. Add in roasted hazelnut. Mix until the nuts become crystallized with sugar. Keep it cool and dry.
Put the hazelnut sable inside a 16-cm cake ring. Add the second layer of hazelnut cake ~240 grams/ring. Spread 80 grams of coffee ganache. Spread 100 grams of hazelnut praline whipped ganache on top. Pour 5 to 6 units of liquid hazelnut praline. Pipe 100 grams total of whipped coffee mascarpone with a star nozzle over the praline dome. Pipe remaining hazelnut praline whipped ganache with a plain nozzle in between piped whipped coffee mascarpone. Cover with a silicone mat