Preheat the oven to 350F. Melt the butter in a pan over low heat, the stir in the crushed cookies and orange zest. Press the mixture evenly into a base of a springform pan(tall cheese cake pan). Cut a big piece of aluminiun foil and cover the botton of spring form pan (that way it will cook perfectly in the bain marie). Set a side
For the filling beat together cream cheese, heavy cream ,ricotta,sugar,orange zest,eggs,flour and vanilla until evenly mix. Pour the batter into the cheesecake pan. Make a Bain marie (use a brownie pan pour water (2 cups)place the springform pan.
Bake it for 1 hour and 30 minutes. Let it chill for 6 hours. Decorate with strawberries or mangoes . great combination.