Put the hazelnuts in a saucepan and lightly warm on the stove. At the same time, put the sugar and water in another saucepan and cook to 118°C (244°F). Pour the cooked sugar onto the hazelnuts and mix well. (1) Place the pan onto the stove and, stirring continuously, cook over a medium heat until the sugar crystallizes. (2) Remove from the heat, spread and separate out the