01 - Blend diced mangoes with lime juice and sugar until completely smooth. Transfer to a container and set aside.
02 - Combine mascarpone cheese, powdered sugar, and vanilla extract in a large bowl. Beat with electric mixer until smooth and creamy.
03 - In a separate chilled bowl, whip heavy cream until stiff peaks form. Gently fold whipped cream into mascarpone mixture until fully incorporated and fluffy.
04 - Combine cooled coffee with rum or mango juice in a shallow dish suitable for dipping ladyfingers.
05 - Quickly dip each ladyfinger into coffee mixture, avoiding oversaturation. Arrange in a single layer at the bottom of an 8x8 inch serving dish or individual glasses.
06 - Spread half of the mango puree evenly over the ladyfingers. Top with half of the mascarpone cream mixture, spreading smoothly.
07 - Repeat with another layer of dipped ladyfingers. Top with remaining mango puree, followed by remaining mascarpone cream. Smooth the top surface evenly.
08 - Cover dish tightly with plastic wrap. Refrigerate for minimum 4 hours; overnight chilling recommended for optimal texture and flavor development.
09 - Just before serving, arrange fresh mango slices and mint leaves on top. Serve chilled.