Heat milk in thick bottomed pan without adding any water.
Bring the milk to boil in medium flame
Once the milk boils, add curd and keep stirring.
Milk will start to curdle and keep stirring in medium flame without burning. If milk doesn't curdle you can add some more curd
keep stirring till milk is fully curdled and water is separated.
Line a muslin cloth in a sieve and drain the curdled milk.
Wash with cold water to easily handle and squeeze the excess water.
Bring together the muslin cloth and allow it to hang to remove excess water for half an hour. Squeeze in between to remove excess water.
After half an hour take the Chenna and knead for 8-10 minutes
Knead till Chenna is soft and smooth.
Shape them as cyclindrical shaped balls. You can add food color and knead the Chenna. I added yellow colour to half of Chenna
Shape the entire chenna and keep it ready