Whisk everything together until smooth, then strain the batter.
Let it rest for 30 minutes.
Lightly grease a non-stick pan and cook very thin pancakes over low heat for about 30–40 seconds per side.
They should stay soft with little to no browning.
Transfer to a plate and let them cool completely.
Whip the cream until stiff peaks form.
Place a pancake smooth-side down, add a spoonful of whipped cream, place a slice of mango in the center, top with a little more whipped cream, then fold in the sides and roll into a neat rectangle.
Chill for at least 1 hour before serving
