1In a saucepan ,boil 1 cup of milk and reduce it to 3/4 cup. Add sugar. Turn off the heat . Mix cornflour in 1 tbsp of water and add this to the boiled milk . Heat it for a minute or two . Let it thicken.
2Turn off the heat. Pass this through a metal strainer . Place it into a bowl of ice cold water. Let it cool . Cover it with cling film and refrigerate for 30 minutes.
3Whip the cream until stiff .
4Now add the custard . Keep whipping.Add guava crush . Whip it gently.
6Transfer it to an air tight container , cover it with cling film and freeze it for 6-8 hrs or overnight.