Prepare the mangoes:
Peel 2 ripe mangoes and remove the flesh from the pit.
Cut the flesh into chunks and place in a blender or food processor.
Blend until smooth to create a puree. Set aside.
Make the cream mixture:
In a large mixing bowl, combine 250g mascarpone cheese, 200ml heavy cream, 1/4 cup sugar, and 1 tsp vanilla extract.
Using an electric mixer or whisk, beat the mixture on medium speed until smooth and creamy, about 2-3 minutes.
Be careful not to overbeat, as this can cause the mixture to become grainy.
Prepare the dipping liquid:
In a shallow dish, combine 1/2 cup mango juice or nectar with 2 tbsp rum or orange liqueur (if using).
If you prefer a non-alcoholic version, use only mango juice.
Assemble the first layer:
Quickly dip each ladyfinger biscuit into the mango juice mixture. Don't soak them, just a quick dip on each side.
Arrange the dipped ladyfingers in a single layer at the bottom of your serving dish (8x8 inch baking dish or individual glasses).
Break the ladyfingers if needed to fit the shape of your dish.
Add the cream and mango layers:
Spread half of the mascarpone mixture evenly over the ladyfingers using a spatula.
Next, spread half of the mango puree over the mascarpone layer.
Repeat the layers:
Create a second layer of dipped ladyfingers on top of the mango puree.
Spread the remaining mascarpone mixture over the ladyfingers.
Finally, add the remaining mango puree on top.
Chill the tiramisu:
Cover the dish tightly with plastic wrap.
Refrigerate for at least 4 hours, or preferably overnight. This allows the flavors to meld and the texture to set properly.
Garnish and serve:
Just before serving, remove the plastic wrap.
Slice additional mango and arrange the pieces on top of the tiramisu for garnish.
You can also dust with a little powdered sugar if desired.
Serve and enjoy:
Use a sharp knife to cut into portions if using a large dish.
If using individual glasses, they're ready to serve as is.
The tiramisu should be creamy and set, with distinct layers visible when cut.