Cover the pot with a lid. Because mine is not suitable for the oven, I covered with foil.
Bake in the oven for 2 hours at 160 degrees C, then for another 1-2 hours at 100 degrees C. Finally, turn off the oven, leaving the pot there for another hour. This is the most delicious option, but it will take some time.
Or, you can simmer on the stove for an hour, then for another hour over a very, very low heat to cook and then let infuse with the heat off for about half an hour.