110g dark chocolate (minimum of 60% cocoa solids), broken into pieces
50g milk chocolate, broken into pieces
Method
Preheat the oven to 180ºC/gas mark 4. Place the shortbread biscuits on a baking tray and bake in the oven for 10 minutes until golden brown.
Place the biscuits in a food processor and add the melted butter and sugar. Blitz until the mixture resembles fine sand in texture.
Gently stir in the popping candy. Place the mixture inside a 15cm cake ring placed on a tray lined with baking paper. Flatten using the back of a spoon then put to one side to set.
Add the cream, salt and passion fruit to a small saucepan and place over a medium heat until it almost comes to the boil. Remove from the heat and allow to stand for 5 minutes, then stir in the fresh custard.
Put the dark and milk chocolate in a bowl. Place over a bain marie (a pan of gently simmering water) and allow to melt completely. Remove from the heat.
Strain the infused cream and add to the bowl of melted chocolate a third at a time, making sure to incorporate the cream thoroughly after each addition. Allow the ganache to cool to room temperature.
Once the tart base has set, use a pastry brush to spread some of the ganache on top of the base and around the edges then place in the freezer for 5 minutes. This will ensure that the ganache will not seep through.
After 5 minutes, pour the remaining ganache into the ring and place the tart in the fridge to set for 2 hours.