Soak cashews in just-boiled water for 15 minutes.
Soak the pitted dates for 5-10 minutes in water to soften. Drain. Combine all crust ingredients into a food processor and run until fully combined. You may need to scrape down the sides a couple of times.
Pour into a round 8 or 9 inch parchment-lined spring foam pan and flatten down to form the crust. This kind of pan is the easiest because the outer rim is removable, but a pie dish can work as well.
Drain the cashews and combine all filling ingredients into a blender. Start on low and slowly turn to high until silky smooth. If you have a Vitamix with the “tamper” (the stick that helps to move things around), use it. If you don’t, you just may have to stop it a couple of times to move things around. Worth it! You want it very smooth.
Pour over the crust and top with sesame seeds + coconut flakes, if you wish. Freeze overnight or for at least 4 hours.
Let sit at room temperature for 10 minutes before removing from the mold (you may need to help pull the springform pan apart.
If serving soon, let sit out at room temperature for 30 minutes. Otherwise, transfer to the fridge where it can live for up to one week in a container. Best enjoyed right out of the fridge!