Soak cashews in water overnight, or in boiling water for 30 minutes. Drain and set aside.
In a food processor, add all of the crust ingredients and blend until crumbly. Press into the bottom of a 9 inch spring form pan (or pie pan). You can form it partway up the sides. Place in the freezer to firm while preparing the filling.
In a high-speed blender, combine soaked cashews, 1 1/4 cup blueberries, coconut oil and vanilla. Blend until smooth. Taste and add honey if desired. Pour into the chilled crust and freeze for 4 hours or until solid. Let thaw for 1 hour before serving. Top with pint of fresh blueberries.