Grind the UNIBIC milk cookies in a blender and make fine powder.
Add icing sugar.
Add melted butter.
Make a smooth dough.keep it a side.
Grease the tart mould with butter.
Roll the Dough in thin sheet on a butter paper.
put the sheet in the tart mould and press it gently to the corners.
Rest it in refrigerator for 30 minutes.
To make ganache:
Heat the fresh cream on a double boiler.
Add broken pieces of dark chocolate and mix to get smooth sauce.
Add vanilla essence.
Tart mould take out from refrigerator.
Pour the ganache in the tart.
Garnish with melted white chocolate.
Chill at least 1 hr. in refrigerator.