Cut the melon in cubes. Put it in a blender, add salt and blend it till it's smooth.
Transfer the melon purée in another container, and add the sugar and the cream to it.
Whisk everything together till the sugar dissolves.
Pour the mixture in the kulfi moulds/ Popsicle moulds and freeze overnight or at least for 6-8 hours.
You can adjust the sugar according to the sweetness of the melon.