In a stand mixer or with an electric hand mixer, beat the cream cheese and greek yogurt together until creamy (about 3 minutes).
Add the pumpkin puree, sweetener, salt, vanilla extract, and pumpkin pie spice and beat for another 30 seconds.
Add the eggs one at a time, beating in between each addition and scraping down the sides.
Boil 8 cups of water.
Wrap your cooled springform pan with the crust in it with strong aluminum foil. Wrap it tightly around the sides and the bottom so that no water can leak in. You can also triple wrap it, just in case!
Pour the cheesecake filling on top of the crust in the aluminum foil-wrapped springform pan.
Place the springform pan into a large roasting dish, and fill around the pan with the boiled water up to about 1”.
Bake for 60-75 minutes. When it’s ready the middle will jiggle slightly, and the sides of the cheesecake will be coming away from the pan.
Turn off the oven, crack the door open with a wooden spoon, and allow the cheesecake to rest in there for 1 hour.
After an hour, the cheesecake can cool to room temperature on the counter (keep the springform pan on!).
When it’s room temperature, pop it in the fridge, uncovered but still in the springform pan, for at least 4 hours, preferably 24 hours.
When you’re ready to decorate and serve, run a then knife around the edge of the springform pan to loosen the cheesecake, and take the springform off. Decorate it with keto-friendly whipped cream, and chopped walnuts or pecans, and enjoy!