Boil milk in a pan.
When the milk starts boiling, lessen the flame to low. Add curd spoon by spoon and stir gently.
Milk will start curdling and milk-solids separate from the liquid.
switch off the flame and remove the pan from flame.
Place a muslin cloth over strainer & place the strainer in another big vessel so that the whey (liquid portion) of the curdled milk can be collected in the vessel.
pour curdled milk into the strainer in which the muslin cloth is arranged.
Bring the boundaries of the cloth to the center, tie and hang it up till the excess water completely drips on its own.
When the water is completely off, place muslin cloth holding milk solids on a chapati maker (on which chapatis are being rolled) & put some heavy object (i used iron kadahi filled with water) on it for about 30 minutes.
Remove the heavy object. unlock the knot of muslin cloth and you will find a white slab kind of thing.
This is your Paneer/cottage cheese.