Peel the banana and chickoo and slice them thinly.
Mix custard powder in half a cup of milk.
Heat remaining milk in a pan and add the custard powder mixture and cook, stirring, till it begins to thicken.
Add sugar and stir till it dissolves.
Add the fruits and cook for two to three minutes.
Whisk the mixture with a hand blender so that the fruits are completely mashed.
Cool slightly and feed the baby.