Combine the cashews, dates, and salt in a small food processor or blender and pulse until very fine and starting to stick together in a sort of dough. It doesn't need to be completely smooth because you still want a little texture. (If you don't have a small food processor this can be done by hand-chopping but it does take much longer to get it as fine.) Pour the mixture into a small dish and set aside.

Add the avocado, lime juice, syrup, and vanilla to the processor and blend until creamy smooth. Divide the mixture into your popsicle molds leaving about 1/2 inch of space empty at the tops (depending on the size of your mold it should fill about 6 slots). Now fill in the empty spaces with your nut/date mixture and press down just slightly.

Insert popsicle sticks in the middle of each pop and freeze for a minimum of 8 hours until solid. Once frozen, run the outside of the mold under hot water for a few seconds to loosen the pops, then serve and enjoy!