I learned to make this when we lived in the Caribbean and had 3 glorious Mango trees in our yard.
1 env. unflavored gelatin
6 tbsp. sugar
1/4 c. cold water
1 1/2 c. fresh mango puree (from 2 lg. ripe mangoes)
1 tbsp. lemon juice
2 lg. egg whites, at room temp.
1/2 pt. (1 c.) heavy or whipping cream
In microwavable 1-quart bowl, combine gelatin and 4 tablespoons sugar. Stir in water and microwave uncovered on high 1 to 1 1/2 minutes or until gelatin and sugar dissolves. Stir in mango puree and lemon juice. Chill mixture just until it mounds slightly. In small bowl, with electric mixer, beat egg whites until foamy. Gradually beat in remaining 2 tablespoons sugar until stiff peaks form. Fold egg whites into mango puree mixture.
In small bowl with beaters, whip heavy cream until stiff peaks form. Fold mango mixture into whipped cream (reserve a little cream if desired, for garnish). Divide mango mousse among 6 serving dishes. Chill mousse until firm. To serve, garnish with whipped cream, mango slice and mint sprigs, if desired.