Preheat oven to 160°C / 140°C fan forced. Grease and line a 23cm round spring form pan with baking paper.
Using an electric mixer, beat egg whites until stiff peaks form, gradually add icing sugar, until mixture is thick and glossy, fold in coconut and vanilla.
Spread mixture evenly into prepared pan; bake for 20 minutes or until golden brown, cool in pan.
Make NESTLÉ DOCELLO Mango Flavour Mousse Dessert Mix according to packet directions, using chilled milk. Spoon over meringue base, smooth top, refrigerate for 1 hour or until firm.
In a medium saucepan, place half the mango puree and sugar, simmer until sugar has dissolved, stir in gelatine sheets, turn off heat, and add remaining puree; mix well, cool.
Pour cooled mango mixture over mousse, refrigerate for 1 hour or until set.
Carefully remove cake from pan, cut into 12 even sized portions, and if desired, garnish with whipped cream and strawberries.