In a large pan, dissolve the cornflour in the milk, and heat gently on a low flame, stirring continuously ( prevent any lumps from forming) Cook this mixture for 3-4 mins till you have a glossy liquid thick enough to lightly coat the back of a spoon.
Cool the cornflour mixture a little till it's just lukewarm. Stir in the sugar and the mango pulp and mix well till you have a smooth mixture.
Now fold in the Greek yogurt till fully incorporated. Spoon into popsicle moulds, leaving a few centimetres on top to allow for expansion. Freeze the pops for at least 4 hours till they're fully set.