Break chocolate and place in heatproof bowl. Add dates, coconut oil, vanilla extract and salt. Sit over a pan (bain-marie) of gently simmering water to melt the chocolate, stirring occasionally. Remove from heat to cool slightly.
Whilst chocolate is melting, heat a heavy pan over medium heat. Add pistachio nuts and gently stir for about 3-5 minutes until fragrant. Transfer to a large bowl to cool.
Repeat the above with quinoa puffs, which need less time, approx. 1-2 minutes. Toast until lightly golden, transfer to a separate bowl and leave to cool, then mix in the Organic Power Green Powder.
Add almost all the nuts and all the quinoa mix to the chocolate bowl. Stir to combine then pour into the parchment lined baking tray to form the base, pressing the mixture into the tin firmly with the back of a spoon. Place in the fridge for 30 mins to set.
Whilst the base is firming up, melt the additional chocolate and coconut oil in a bowl until smooth. Remove the set base from the fridge and pour over it the chocolate, spreading evenly with a palate knife.
Lightly sprinkle with the remaining pistachio nuts. Place back in fridge and chill for a further 30 min to set, then cut into finger length bars or small squares. Store in airtight container in fridge for up to one month.