Boil milk in a heavy-bottomed pot until it's reduced to about a third of its original volume.
Mix lemon juice with a cup of water.
Slowly pour this mixture into the milk, then cover the pot.
Turn off the heat and let it sit for 10 minutes.
By this time, the milk should have curdled, separating the whey from the solids.
Now, strain the whey using a cheesecloth.
Gather the edges of the cheesecloth and tie them together.
Place the chana-filled cheesecloth on a flat surface and weigh it down to remove as much moisture as possible.