SYRUP : cook sugar and water until the sugar dissolved, remove from heat and set aside.
Sauce: Boil the thin coconut milk, pandan leaf and a little salt. Stir until boiling (continuously so it doesn't form a separate layer of water and coconut milk, or not break up). Chill.
Put the pieces of mango and coconut or nata de coco in serving glasses.
Top with coconut milk sauce, add the basil seeds and sweetened condensed milk. Add ice and ready to enjoy as you wish.