Stir the chia seeds through the coconut milk in a bowl or jar. After five minutes, stir again thoroughly so no clumps form.
Cover the pudding and let it set in the refrigerator for at least an hour, or preferably overnight, until it reaches a thick smooth consistency.
Cut the half mango into cubes. Spoon the set chia pudding into a glass or bowl.
Scatter the mango cubes over it and finish with some fresh lime zest for a refreshing touch. Serve chilled.