Peel and slice the mango into large, thick pieces (aim for center-cut pieces for a clean cross-section).
Whisk the heavy cream and sugar in a bowl until stiff peaks form.
Cut off the crusts from the milk bread slices.
Spread a generous layer of whipped cream on one slice of bread.
Place the mango pieces in the center.
Add another layer of whipped cream on top of the mango.
Place the second slice of bread on top and gently press down.
Tightly wrap the sandwich in plastic wrap (saran wrap).
Refrigerate for at least 30 minutes to help it set.
Remove from the fridge and slice diagonally to reveal the beautiful mango cross-section.
Serve immediately for the freshest taste!