Homemade cheese 10 times cheaper than store bought

Ingredients:

A small box of cornstarch – 200 g
A pot of butter or margarine – 250 g
2 packets of grated parmesan – 100 g
A pinch of salt
1 liter of milk
Preparation:

First, mix the milk, cheese and cornstarch without heating, just to eliminate the lumps by stirring a little.
Then add the butter, turn on the heat and stir until it melts completely.
Continue stirring until the cheese reaches the desired point, which is when it releases easily from the pan.
Then put it in a container (usually we use glass dishes or ice boxes) and wait for it to cool.