In a roomy pot of about 3 L (12 ½ cups), put boiling water, salt and add the cornmeal. Use 4 cups of water to a cup of cornmeal.
First, mix it with a whisk to make sure that no lumps form.
When the polenta starts to boil (attention! It bubbles!) switch to a wooden spoon. The polenta should be stirred continuously during cooking. It thickens and spits like a volcano.
Boil the polenta for about 10-12 minutes. Taste it to check it is done, which is when it doesn’t feel gritty to the teeth. If necessary, add more salt so that it is not bland.
Theoretically, the polenta is now ready and can be served…. but there is one more step. Another procedure is needed.
Take the pot off the heat and scrape all the polenta from the sides of the pot and press it down with the back of a spoon.
Cover the pot with a lid and leave the polenta to steam for 3-4 minutes.
Then return to the heat (low to medium) and wait until you hear a rumble erupt from under the lid. It only takes 1 minute.
This is the trick to get the polenta to detach itself from the sides of the pot, helped by the force of the steam coming out of it.
Immediately replace the lid with a plate (or with a clean wooden board) and overturn the whole thing so the polenta is turned out onto the plate. Ta-daa !!