Place the cashews in a large bowl, cover with a generous amount of boiling water and leave to soak for about 60 minutes.
130 g (1 heaped cup) unroasted cashews
Line the base and sides of a 20 cm/8 in round springform cake tin with baking paper.
To make the crust, place the sandwich cookies in a food processor and blitz to fine crumbs. (Alternatively, place them in a sealable freezer bag wrapped in a tea towel and bash them with a rolling pin.)
275 g (25 cookies) Oreos or Bourbon biscuits
Tip the crumbs into a bowl and stir in the melted vegan butter. The mixture should resemble wet sand.
75 g (⅓ cup) vegan butter
Tip the biscuit mixture into the prepared tin and pack the crumbs down really firmly and evenly, use the base of a glass to help press them down. Pop it in the fridge while you prepare the filling.
Drain the soaked cashews really well and transfer them to a blender along with the peanut butter, cream cheese, yogurt, brown sugar, lemon juice and vanilla extract. Blend until totally smooth with no hint of graininess. This can take a while so stop regularly to let the blender cool down and scrape down the sides as needed.
260 g (1 cup) smooth, creamy peanut butter (NOT the runny natural kind)*, 500 g (18 oz) vegan cream cheese, 80 g (⅓ cup) thick, Greek style soya yogurt OR coconut cream OR silken tofu, 100 g (½ cup) light brown soft sugar, 2 Tablespoons lemon juice, 1 Tablespoon vanilla extract
Pour the cheesecake mixture on top of the biscuit base and spread it level. Refrigerate for at least 6 hours, preferably overnight, until firm.
Once the cheesecake has set, unclip the springform tin and remove the sides. Gently slide it onto a serving plate, a cake lifter is useful for this; then peel the baking paper off the sides of the cheesecake.
To make the ganache, place the chopped chocolate and the peanut butter in a heat-proof bowl. Heat the milk until just coming up to a simmer then pour it over the chocolate. Leave to sit for 5 minutes, then stir until melted and smooth. Allow to cool for about 20 minutes, until it has thickened slightly and is no longer hot to the touch.
125 g (4 ½ oz) 60-70% dark chocolate, 35 g (2 Tablespoons) smooth peanut butter, 135 g (½ cup + 1 Tablespoon) non-dairy milk (I use soy)
Spoon the ganache on top of the cheesecake and spread it level, sprinkle with chopped roasted peanuts then return the cheesecake to the fridge for 30 minutes for the ganache to set before serving. Keep the cheesecake refrigerated in a covered container until ready to serve.
a couple of handfuls roasted salted peanuts