1: If your pistachios still have skins, put them in boiling water for 5 minutes.
2: Drain them, then remove skins while still wet and hot (it's easier).
3: On a baking sheet, put 50 g whole almonds, 50 g pistachios and 50 g walnut kernels, put in the oven at 150°C or 302°F for 5 minutes until lightly toasted.
4: Remove from the oven, allow to cool and chop roughly.