At least an hour (and preferably overnight) before making the pie, soak your raw cashews in warm tap water. Hot water will speed up the softening process. Soak cashews until tender and slightly plumped. Drain and set aside. Overnight soaking is not necessary, but the pie will be a bit less moist, and blending a bit stiffer, without the overnight soak.
Prep your crust. If you are making a crust from scratch, follow directions according to recipe.
Pre-heat oven to 425 degrees for pie baking.
Add the pumpkin puree, maple syrup, soaked and drained cashews, pumpkin pie spice, vanilla and salt to a blender. (If adding optional ingredients, do that now as well: apple, vegan cream cheese.)
Blend until silky smooth.
Pour the pie filling into your two pie crusts. Bake at 425 degrees for 15 minutes. Then reduce oven temperature to 325 and bake for an additional 40-50 minutes. You want the top to be slightly browned and bubbly. Longer baking time will lead to a drier filling.
Cool pie on the counter for an hour or so, then cover with foil and chill overnight in the fridge for serving the next day. Pies can be made up to 2-3 days in advance and stored in the fridge.