Strain mangoes with a sieve. Collect the juice in a bowl.
Puree the mango pieces and the ginger.
Add the pureed mixture to the mango juice set aside to make a total of 300 ml.
Whip the cream in another bowl until slightly stiff. Whisk in the mango mixture.
Melt the gelatin in hot water and let it cool a little.
Stir the gelatin into the mango whipped cream mixture, stirring constantly. Chill in the refrigerator for about 30 minutes.
Whip the egg whites in a bowl until they form snow, gradually adding the sugar. Fold the egg whites into the mango mixture with a whisk.
Fill the mango mousse into dessert bowls, decorate with candied ginger and lime zest and serve.