Preheat oven to 325F (163C).
In a medium bowl, mix almond butter with water until smooth.
Add in rice protein and cinnamon. Mix until combined. (If the batter is sticky, add a little more rice protein.)
Press into pie pan, and set aside.
Meanwhile, combine pumpkin and spices, set aside.
Mix whey protein with water, then add to pumpkin and spices.
Add eggs. Mix slowly until combined.
Pour into pie crust.
Bake for 50-60 minutes, until the center of the pie is firm to the touch.
Let cool completely and enjoy!