Mix the flour, the butter, the egg and the tbsp of sugar and make it a little soft ball, cover with plastic food wrap and let it rest in the fridge for about 15 minutes.
Start preparing the filling by putting together the ricotta cheese and the ¼ cup of sugar. Crumb the Lago hazelnut wafers and add it to the ricotta cheese, sugar, hazelnut or cocoa spread and the chopped hazelnuts.
Take the dough out of the fridge, butter a pan and add 2/3 of it inside, leaving the remaining 1/3 for decoration.
Preheat the oven at 350F. Start spreading the filling from the base of the dough and then decorate with criss-crossing strips
Bake it for about 35-40 minutes or until a toothpick inserted into the center comes out clean.