In a heatproof bowl, whisk whole eggs with sugar and vanilla until light.
Place over a bain-marie (simmering water bath) and whisk constantly until the mixture becomes thick, pale, and warm to the touch, for about 5–7 minutes or until reaches 160–170°F (70–75°C).
Add salt, mix to combine and remove from heat.
Add the pistachio paste.
Mix until well combined.
In a separate bowl, whip the whipping cream to medium peaks.
Gently fold the whipped cream into the cooled pistachio egg base.
Pour into a container, smooth the top, cover, and freeze for at least 6 hours or overnight.
Top with chopped toasted pistachios and enjoy!