Step 1.  Preheat oven to 350 degrees F.

Step 2.  Mix the almond flour and whey protein powder together in a medium-sized bowl. Add the egg and melted butter and mix well.

Step 3.  Press the dough into the bottom and up the sides of a glass or ceramic pie pan. Poke holes in the crust with a fork to let out steam.

Step 4.  Bake for 12-15 minutes until lightly browned around the edges.  Remove from the oven and let it cool.

Step 5.  Preheat oven to 350 degrees F.

Step 6.  In a large bowl, mix together pumpkin puree, sweetener, and spice.  

Step 7.  Mix in heavy whipping cream.

Step 8.  Mix in eggs.  Taste for sweetness and spice and add more if desired.

Step 9.  Pour pumpkin mixture into the pie pan and cover the edges with tin foil or crust protector so that they don't burn.  

Step 10.  Bake for 40-50 minutes until a knife inserted 1 inch from the crust comes out clean, but the center is still a bit jiggly.

Step 11.  Cool on a wire rack for 2 hours.

Step 12.  Serve warm or refrigerate.