French-style Beans Start with Mirepoix UncategorizedBean Bulletin, Cooking Mirepoix (pronounced “meer pwah”) is a deceptively simple way to add rich flavor to any type of beans. A combination of sautéed onions, carrots, and celery, it serves as a foundation for a variety of dishes in French cuisine. Traditional mirepoix uses two parts onion to one part each of carrots and celery, but these measurements don’t have to be exact. Chop the vegetables finely and then sauté in olive oil or butter over very low heat. Cooking the vegetables slowly brings out their sweetness. Once the vegetables are softened, simply add them to any kind of cooked beans along with salt and pepper and any herbs you wish. Mirepoix freezes well, too, so you can always have it on hand.