Blend the milk, condensed milk, cream, and coconut milk in a blender.
Add the gelatin prepared according to the package instructions and continue beating.
Place in an oiled pudding mold.
Place in the fridge until firm.
In a pan, add the sugar and heat until caramelized.
Add the water, the plum and let it boil for a few minutes. Let cool and spread over the unmolded manjar.