Preheat oven to 325F (163C).
Mix cashew butter, water, and molasses until well combined.
Add remaining crust ingredients, and mix well. If the dough is too sticky (sticks to your fingers), add 1 or 2 tablespoons more of protein powder. If the dough is too dry (and crumbles), add another tablespoon of filtered water.
Press into 8" square (or similarly sized) baking dish, and set aside.
Mix the Neufchâtel cheese, eggs, yogurt, and pumpkin until smooth.
Add vanilla, whey powder, stevia, and pumpkin pie spice. Mix or blend until smooth.
Pour cheesecake batter evenly over crust.
Bake for 15 minutes at 325F (163C), and then reduce the temperature to 200F (93C) and bake for another 15 minutes. The cake should be removed from the oven while the center is just about firm.
Let cool at room temperature, then transfer to refrigerator and let cool completely.
Cut into 16 bars, and enjoy! Store in the refrigerator.