Preheat the oven to 325°F (160°C). Grease and line a springform pan.
Mix crushed biscuits with melted butter and press firmly into the bottom of the pan. Chill while preparing the filling.
In a large bowl, beat the cream cheese and sugar until smooth and creamy.
Add eggs one at a time, mixing gently after each addition.
Mix in mango puree, sour cream, vanilla extract, and cornstarch until fully combined.
Pour the cheesecake filling over the prepared crust and smooth the top.
Bake for 45–50 minutes or until the center is slightly set.
Turn off the oven and let the cheesecake cool gradually with the oven door slightly open.
Refrigerate for at least 4 hours or overnight until fully chilled.
Top with mango puree and fresh mango cubes before serving.