Combine flour with salt, ground hazelnuts and sugar. Place on a clean working surface and form a small hole in the center. Roughly grate the cold butter and place it around the flour. Crack the egg in to the center where the hole is. Using your thumb and index finger, rub the butter in to the flour mixture and egg. Wrap in clingfilm and refrigerate for 30 minutes.
While the dough is cooling, combine all the Honey Hazelnut Topping ingredients in a medium sized saucepan. Bring to boil over medium heat and keep stirring. As soon as the mixture boils take it of the heat and allow it to cool to almost room temperature.
Preheat the oven without convection at 200 C or 390 F. Roll the shortbread dough out to a quarter inch or 0.5 cm thickness in to a rectangle. Line a baking tray with parchment paper and place the dough on the baking tray. Now spread the cooled nut mixture evenly over the shortbread dough. Bake at for 20 to 25 minutes until golden brown. Note the edges might get a bit darker so watch that they don't burn. Cut into triangles while still hot, then set aside to cool before dipping in chocolate.
Using a small saucepan and a heatproof bowl, make a bermarie and melt the chocolate. Add 1-2 Tablespoons of coconut oil to make a thinner chocolate cover. You can set 20% of the chocolate aside to temper. Simply stir the remaining chocolate (off the heat) into the molten chocolate until dissolved. Dip the corners of each nussecken and set on a piece of parchment paper to set. Once set the nut triangles are ready to be enjoyed.