01 -
Preheat the oven to 175°C and lightly grease a 23 cm tart pan.
02 -
In a food processor, pulse toasted hazelnuts until finely ground. Add flour, brown sugar, and salt, then pulse to combine evenly.
03 -
Add cold cubed butter and pulse until the mixture forms coarse crumbs.
04 -
Firmly press the mixture into the tart pan, ensuring an even layer on the base and sides.
05 -
Bake the crust for 15 minutes or until golden brown, then allow it to cool completely.
06 -
Combine Nutella, heavy cream, and vanilla extract in a bowl; whisk until smooth and homogeneous.
07 -
Pour the filling into the cooled crust and spread evenly. Optionally, sprinkle with chopped hazelnuts and a pinch of sea salt.
08 -
Refrigerate the tart for a minimum of 2 hours to set before slicing and serving.