Place half of the mango cubes, sugar and the mango juice in a blender. Blend till smooth.
In a bowl, place pureed mango, milk and whipping cream. Leave this mango sauce in the fridge to cool.
Put a small pot of water to boil. Once boiling, add the sago seeds. Lower heat and cook for around 10 minutes or till the sago seeds turn translucent
Pour into a sieve and give the sago a quick rinse.
Drain the sago and add it into the bowl of mango sauce.
Add the oranges and mango.
Cover the bowl with a cling wrap and let it cool in the fridge till ready to serve.