Definition: Mirepoix is a combination of chopped carrots, celery and onions used to add flavor and aroma to stocks, sauces, soups and other foods. The proportions (by weight) for making mirepoix are 50% onions, 25% carrots and 25% celery.
By Danilo Alfaro, About.com Guide
Mirepoix
Photo © Danilo Alfaro