Pour the water into a small saucepan and sprinkle the gelatin on top.
Turn on low heat, stirring constantly until gelatin is dissolved. Let cool.
Place the avocado, cream cheese, peppermint extract, stevia and salt into a stand mixer and blend on high until smooth or place in a large bowl and use an electric hand mixer to blend.
Taste and adjust sweetness if needed.
Pour in heavy whipping cream in another mixing bowl and use an electric mixer to blend on high until soft peaks form. Fold into the cream cheese mixture.
Gradually pour in the cooled gelatin and stir until combined.
Pour filling into pie crust.
Refrigerate at least 2 hours, loosely covered or up to 1 day in an airtight container.
When ready to serve add optional chocolate drizzle if desired.