Keep in a double boiler/bain marie to melt ⅔ of the chocolate, melt and add the rest to temper the chocolate (see instructions in post) or if you don't care to temper just melt the chocolate simply. Mix the chopped hazelnuts and chili flakes into the chocolate.
Pour the chocolate until full into the molds.
Let it cool until hard, this might take a while so keep aside.
Take the chocolates carefully out and store them in a cool place.