In a saucepan off the heat, combine the sugar and cornstarch with a whisk. Add the coconut milk and water. Bring to a boil while stirring and simmer gently for about 10 seconds. Remove from the heat. Add the lime juice. Pour into a Popsicle mould. Insert the sticks. Freeze for 5 to 6 hours.
In a food processor, purée the mango and sugar until smooth. If necessary, add water.
Unmould the popsicles and dip in the mango coulis. Serve immediately.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.