- Lightly grease a pie plate with cooking spray or coconut oil.
- For crust: In a food processor, combine walnuts, dates, and cocoa powder (if using). Pulse several times until the mixture is crumbly and starts to stick together. Press the crust mixture down into the pie plate. Place in the freezer while you prepare the filling.
- For filling: Add the watermelon, orange, orange zest, Greek yogurt, powdered sugar, heavy cream, cream cheese, and vodka (if using) to a high-powered blender. Blend until smooth and well-combined.
- Pour the filling into the prepared pie crust. Carefully place the dish back in the freezer on a flat surface, and let set for about 3 to 4 hours, until firm. Enjoy! If leaving in the freezer longer, remove about 15 minutes prior to serving to let it soften up a bit.