Place the gluten-free biscuits in a food processor and crush until finely ground. If you don't have a food processor, you can crush your biscuits by placing them in an airtight bag and rolling them with a rolling pin.
Transfer the crumbs to a medium bowl, add the melted butter and vanilla extract. And mix it well until everything is well combined and the crumbs are evenly moistened.
Press the mixture in a tart pan with a removable bottom. (I used a 6inch tart pan, if using bigger you might need to increase the amounts of the ingredients)
Place the crust in the fridge to chill while you are preparing the filling.
To make the cheesecake filling:
In another bowl cream together the cream cheese and confectioners sugar. Then add the peanut butter and mix again, until everything is well combined.
Pour the filling over the tart crust
Place it in the fridge to chill for at least 1h
To make the chocolate ganache
Heat the cream in a small saucepan. When the cream just begins to boil at the edges, remove from heat and pour over the chopped chocolate. Let sit one minute, then stir until smooth.