Source: The Martha Stewart Show, Episode 5132
- 5 ribs celery, coarsely chopped
- 3 carrots, coarsely chopped
- 2 cups minced onion
- 1/2 cup plus 2 tablespoons extra-virgin olive oil
Place celery in the bowl of a food processor; process until minced (you should have about 1 cup). Repeat process with carrots (you should have about 1 cup).
Heat oil in a large saucepan over medium-high heat. Add celery, carrot, and onion; cook, stirring occasionally, until mixture is no longer steaming and vegetables are caramelized, about 1 hour.