01 - Blend diced mangoes with lime juice and sugar until completely smooth. Reserve for assembly.
02 - Beat mascarpone cheese, powdered sugar, and vanilla extract with electric mixer until creamy and lump-free.
03 - In separate chilled bowl, whip heavy cream to stiff peaks using electric mixer or whisk.
04 - Gently fold whipped cream into mascarpone mixture until fully incorporated and fluffy.
05 - Combine cooled coffee with rum or mango juice in shallow dish for dipping ladyfingers.
06 - Quickly dip ladyfingers in coffee mixture (avoid oversoaking). Arrange single layer in 8x8 inch dish or individual glasses.
07 - Spread half the mango puree over ladyfingers, followed by half the mascarpone cream mixture.
08 - Repeat with dipped ladyfingers, remaining mango puree, and remaining mascarpone cream. Smooth top evenly.
09 - Cover tightly with plastic wrap. Refrigerate minimum 4 hours, preferably overnight for best texture.
10 - Top with thinly sliced fresh mango and mint leaves just before serving.