First, boil 2 cups of water. Place cashews in a mason jar and pour boiling water over nuts until they are completely covered. Let soak for 1 hour.
Make the Crust
Grease a mini cheesecake pan, then set aside.
Mix melted coconut oil and cookie crumbs together until well combined.
Drop 1 tablespoon scoops of the crust into each well of the mini cheesecake pan and press the crumbs evenly around the bottom of the well.
Repeat with each well until all the cookie mixture has been used.
Put the mini cheesecake pan in the freezer for the crusts to harden.
Make the Filling
Drain the cashews.
Put all the ingredients in the order listed into a high-powered blender.
Turn blender on low, gradually increasing to high speed. Blend until all ingredients are combined and mixture is smooth, about 1-2 minutes.
Putting it together
Remove pan from the freezer, making sure crusts are hardened, then add 2 tablespoons of the key lime filling to each well. Smooth with the back of a spoon and tap the pan against a hard surface to release the air out of each well.
Refrigerate for at least 3 hours, or overnight. Enjoy with coconut chips, chopped pistachios, and sliced lime.