In a food processor pulse together dates, pecans, vanilla extract and sea salt. Transfer mixture into an 8-inch square casserole dish. With your hands press mixture together and down towards the dish so that the ingredients stick together, this layer will be the "crust". Next, in a food processor or blender combine raw cashews that have soaked in water overnight (or at least for 1 hour) with maple syrup, pumpkin puree, and pumpkin pie spice. Spread this mixture as a second layer on top of the date and pecan crust. Lastly, add a sprinkling of crushed pecan on top. Place dish in the freezer to set overnight. Store in the freezer. Enjoy!