Place the cookies in the bowl of a food processor. Pulse until the cookies form fine crumbs.
Transfer the crumbs to a medium bowl. Add the melted butter, and stir until thoroughly combined. Press the crust mixture firmly and evenly into the bottom and up the sides of a 9-inch tart pan with a removable bottom.
Bake 12 to 14 minutes, or until lightly browned. Set aside to cool completely.
To make the filling:
Using an electric mixer on medium-high speed, beat the cream cheese, mascarpone, sour cream, cream of coconut, and sugar until thoroughly combined and smooth.
Add the coconut and vanilla, and mix until combined. Transfer the filling mixture to the cooled crust, and spread evenly.
Cover and refrigerate at least 4 hours. Garnish with pecans and coconut before serving.
Notes
*Make sure to use cream of coconut, which is thickened and sweetened.