Mirepoix is an aromatic vegetable mixture made by roughly chopping onion, carrot, and celery, usually in a 2:1:1 ratio, and combining them. It is added during cooking to give a base flavor to stocks, sauces, and soups; the size of the cut can range from coarse to fine depending on the cooking time.
Where It's Used
“Chop onion, carrot, and celery mirepoix and add to the stock.”