This recipe is created with a base flavor made from three common vegetables - onions, celery and carrots. Commonly known in French cooking as "mirepoix", this simple combination of ingredients or aromatics is made from finely diced vegetables that are cooked at a low temperature in butter or oil, to sweeten the ingredients rather than caramelize them. These slow-cooked vegetables form the first layer of flavor to many recipes. Learn more at theforkedspoon.com