In a blender or food processor, combine 2 medium peeled and cubed mangoes, 2 1/2 tablespoons of honey, and 2 tablespoons of lime juice.
Puree the mixture until smooth.
In a separate bowl, whip 1 1/4 cups of heavy cream until soft peaks form.
Gently fold the whipped cream into the mango puree.
In a clean, dry bowl, beat 2 egg whites until stiff.
Stir half of the beaten egg whites into the mango mixture.
Gently fold the remaining egg whites into the mousse until no streaks remain.