Pour mango nectar into a medium saucepan, place over medium heat. Place milk and cornstarch in a medium mixing bowl. Stir to combine and slowly pour into the mango nectar, stirring continuously. Increase heat to medium-high and continue stirring until thick, about 4-5 minutes. Remove from heat and stir half of diced mango into mixture. Pour pudding into 4 ½ cup custard cups. Refrigerate pudding for at least 2 hours or up to overnight. Combine remaining mango with mint and spoon over chilled pudding.
4 servings