Line a plate with parchment paper.
Roughly break the chocolate and put it in a double boiler – in a bowl over a saucepan filled with 1 cup of water, over medium low heat. DO NOT stir the chocolate. Sprinkle a tiny bit salt and cook until the chocolate is melted.
Make a lengthwise slit in the dates and remove their pits. Stuff each date with a walnut and tighten it around the nut so the nut stays in.
Transfer the melted chocolate into a medium, deep bowl. Dip each date in the chocolate – you can use chopsticks, tongs or a tooth pick to grab it – and place it on the lined plate.
Put the plate in the fridge until the chocolate is solid – about 20 minutes.