• Oil a 9 inch springform pan evenly on the base. Line it with parchment paper round on the bottom. Line the sides of the cake pan with either a cake collar or strips of parchment paper.
• If you are making the vanilla sponge base, line the sides with a cake collar only after the cake has baked and cooled.

For the cheesecake base

• Transfer the cookies/graham crackers into a ziploc bag and bash them with a rolling pin till you get fine crumbs. Transfer the crumbs into a bowl and mix well with the melted butter until it resembles wet sand. Then pour this mixture into the springform pan and spread the crumbs evenly on the bottom. Press the crumbs down first with your spatula and then use a flat based glass/cup to pack the crumbs down tightly. Chill the biscuit base in the refrigerator for 1 hour or until firm.

Alternate option: For the vanilla sponge base

• Preheat your oven to 350F/175C.
• Cream butter and sugar together in a bowl with a spatula until light and fluffy. Whisk in egg, vanilla extract and milk.
• Whisk in the dry ingredients (flour, corn starch, baking powder and salt) in a separate bowl and add them to the wet mixture.
• Mix briefly until well combined and pour the batter into the springform pan. Level the surface and bake for about 18 minutes or until a toothpick inserted into the center comes out clean. Let the cake cool at room temperature for an hour before chilling in the fridge for another hour.

For the cheesecake filling:

• Using either a stand mixer, handheld mixer or regular whisk and a large bowl, whisk the heavy cream with ½ cup powdered sugar and 1 teaspoon vanilla extract until it thickens and stiff peaks form. Make sure the cream is chilled thoroughly before beating. Be careful not to over mix otherwise you will turn the cream into butter! Reserve ¼th of the whipped cream mixture for decoration (in a piping bag, if desired). Transfer the remaining whipped cream into a separate bowl for later.
• Sprinkle the gelatin/agar agar powder over the room temperature water and let sit for 10-15 mins. After the agar agar/gelatin has absorbed all the water and become thick, either heat it in a saucepan on the stove-top or in the microwave until it is completely melted. Set this mixture aside while you proceed with the next steps. If using agar agar, make sure this mixture comes to a boil before you take it off the heat.
•  In a separate bowl, beat the cream cheese for 2-3 minutes until it turns smooth and creamy. Add 1 teaspoon of vanilla extract and ¾th cup of powdered sugar and beat until everything is well combined. Now add mango pulp and mix until the mango pulp is well incorporated.
• Add in the agar agar/gelatin mixture and beat until everything is well mixed. If using agar agar, you need to move quickly while it is still hot and also make sure your mixture is completely liquid before mixing into the cheesecake filling. If it has thickened up, reheat it till it becomes a smooth liquid and then add it in. Add it in with the mixer still running to avoid clumps.
• Fold in the reserved whipped cream mixture into the mango filling in 3-4 additions, mixing gently and making sure to keep as much air as possible.
• Finally mix in the cubed mango pieces gently and pour the cheesecake filling evenly over the biscuit base. Tap on the counter top a few times to level the surface and chill it in the refrigerator for 3-4 hours.

For the mango gelee topping

• Sprinkle the gelatin/agar agar powder over room temperature water and let sit for 10-15 mins. After the agar agar/gelatin has absorbed all the water and become thick, either heat it in a saucepan on the stove-top or in the microwave until it is completely melted. If using agar agar, make sure this mixture comes to a boil and then take it off the heat.
• Mix this with the mango pulp and pour this mixture over the cooled cheesecake layer. Pop any air bubbles with a skewer if needed and refrigerate the cake for 2-3 hours or until the gelee has set completely.

Unmolding & decorating

• When ready to serve, take the cake out of the refrigerator and release the spring form. Transfer the cake onto a serving platter/cake stand and peel off the cake collar.
• Decorate the cake with more cut fruits of your choice and the reserved whipped cream. Cut into slices and serve!