Place a rack in the middle of the oven and preheat it to 190 °C / 375 °F. Prepare a 22cm (9-inch) tart mold.
cookie crumb crust
In a bowl, combine ground cookies, sugar, and melted butter. Transfer the mixture to a 22 cm (9-inch) tart mold. Press the homemade cookie dough onto the bottom and up the side of the tart mold. Transfer to the preheated oven on the middle rack. Bake for 10 - 12 minutes at 190 °C / 375 °F. Remove from the oven and set aside for 30 minutes to cool.
Cut the butter into small cubes. Pour the heavy cream into a saucepan and set over medium heat. Bring to a boil. Remove from the heat, add a pinch of salt and chopped chocolate. Using a whisk, stir to combine to get a smooth, shiny mixture. Stir in the cream cheese and butter. Stir into a smooth chocolate ganache.
chocolate ganache tart
Pour the chocolate ganache into the cooled cookie crumb crust and place in the fridge for at least 2 hours or overnight. Serve with whipped cream.