Mix the dry coconut cookies and the small butter cookies fairly finely.
Add the melted unsalted butter, and mix well. Using a glass, tamp this mixture onto the bottom and side of a 22 cm diameter springform pan. Place in the fridge.
Coconut filling
With a mixer (or in a food processor), mix the cream cheese, semi-thick cream, powdered sugar, coconut milk, grated coconut, cornstarch until a smooth mixture is obtained.
Incorporate one by one the whole eggs previously relaxed with a fork.
Pour the filling into the mold on the biscuit base and cook for 1 hour. Let the cheesecake cool in the half-open oven, then place in the fridge for at least 3 hours (overnight is better).
Melted chocolate
In a saucepan, melt the dark chocolate and the diced sweet butter over low heat. Smooth well.
Let cool before coating the cheesecake with chocolate, smoothing everything. Add a little grated coconut.
To be enjoyed immediately if you want the chocolate to be soft, or after taking it in the fridge if you want it a little harder (like me).
Notes
Store in the refrigerator (ideally under a cover). Like all cheesecakes, it will be even better the next day!