The base of mushroom bolognese or any bolognese is aromatics i.e. classic Italian mirepoix of diced onion, carrots, and celery. (chefdehome.com)
Agonizing hours in which your home will be scented with mirepoix *, garlic, cumin, and, gradually, perfectly cooking pork, and there will be nothing you can do about it other than wait. (soupaddict.com)