Peel and get the mango puree ready.
Add the sugar to the mango puree, take this puree in a sauce pan.
Add 1.25 cups of milk to the milk and combine well.
Make a slurry of cornflour with 1/4 cup Milk and make a smooth paste.
Put the sauce pan on medium flame, keep stirring it well so that the whole mix gets well blended.
When it starts to boil, cook on 5 minutes until the mixture starts to bubble.
At this stage lower the flame, add the cornflour slurry and quickly mix well to combine everything.
Continue cooking for 5 more minutes, then remove the pan from flame, add the lemon juice and mix well.
Add at the very end else milk will curdle.
Transfer to a greased bowls, cover with cling film and let it cool down.
Refrigerate for 2 hours.
Serve chilled.