Place the cashews in a bowl and pour enough boiling water over them to cover. Cover the bowl and place overnight in the refrigerator to soak the nuts.
Break up the rusks and place in the bowl of a food processor with the shredded coconut, dates and olive oil. Process to a coarse meal that comes together when pressed. Press into a lined & greased 6-inch (15-cm) springform pan. Set aside.
For the filling: In the bowl of a powerful blender or food processor, combine the soaked cashews, coconut or almond milk, petimezi or maple syrup, olive oil, lemon juice, zest, vanilla, cinnamon, and salt. Process on high speed until the mixture is creamy and smooth.
Pour into a lined and prepared springform pan. Freeze overnight until set.
A few hours before you’re ready to serve, remove the frozen cheesecake from the mold and set onto a plate. Defrost in the refrigerator for a couple of hours. Test the center with a toothpick to be sure it’s completely defrosted and serve drizzled with a little honey, maple syrup or petimezi on top.