01 - Combine diced mangoes, lime juice, and sugar in a blender. Process until completely smooth and set aside for layering.
02 - Beat mascarpone cheese, powdered sugar, and vanilla extract in a large bowl using an electric mixer until completely smooth and creamy.
03 - In a separate chilled bowl, whip heavy cream until stiff peaks form. Gently fold whipped cream into mascarpone mixture until light and fluffy.
04 - Combine cooled coffee with rum or mango juice in a shallow dish for dipping ladyfingers.
05 - Quickly dip each ladyfinger into coffee mixture (do not soak) and arrange in a single layer at the bottom of an 8x8 inch dish or individual serving glasses.
06 - Spread half of mango puree over ladyfingers, followed by half of mascarpone cream. Repeat layers with remaining dipped ladyfingers, mango puree, and cream.
07 - Smooth top surface, cover tightly with plastic wrap, and refrigerate for minimum 4 hours or preferably overnight to allow flavors to meld and texture to set.
08 - Top with thinly sliced fresh mango and mint leaves just before serving. Serve chilled in individual portions.