Blitz the hazelnuts in a food processor until they resemble a fine breadcrumb.
Add the dates, cocoa, maple syrup, vanilla extract and oil and blitz until the mixture clumps together, you may need to add a tablespoon of water.
Scoop out a tablespoon of the mixture and shape into balls between the palms of your hands.
Place the balls on a parchment paper lined baking tray, one that will fit into your fridge. Place the tray in the fridge for 30 mins to 1 hour.
Break up the chocolate, place in a heat proof bowl over a saucepan of simmering water to melt the chocolate.
Roll some of the balls in chopped hazelnuts and then cover in melted chocolate, top with a little sprinkling of chopped hazelnuts and place on the lined tray.
Cover the rest of the balls in the melted chocolate and add the toppings, place them on the tray then put the tray back in the fridge for an hour.
These will keep for a week once in an airtight container in the fridge.