Mirepoix (from the French town of the same name) is the French name for a combination of onions, carrots and celery (either common Pascal celery or celeriac). Mirepoix, either raw, roasted or sautÃ©ed with butter, is the flavor base for a wide number of dishes, such as soups, stews and sauces. These three ingredients are commonly referred to as aromatics. Similar combinations, both in and out of the French culinary repertoire, may include these, as well as leeks, parsnips, garlic, tomatoes, shallots, mushrooms, bell peppers, chiles, and ginger. For the combination mirepoix au gras, ham and/or pork belly are used as additional ingredients. They may be used in various combinations, as dictated by the cuisine and the dish itself.