Place in a large pot on medium heat and add all the ingredients except of the parsley. Take care of the saltiness of the broth and season, or not, accordingly.
Bring to a boil, cover with the pot’s lid and simmer for 5 hours and for an extra 45’ uncovered, while stirring every now and then and taking care not to dry out.
Serve and garnish with the parsley. It can be made a day on advance and refrigerated.