A good tomato sauce is the foundation for so many wonderful dishes—pizza, pasta, chicken, and fish. Here is what we're offering you to try at your dinner table. Ingredients [ingredients] 2 Tbsp olive oil 1/2 medium onion, finely chopped 1 small carrot or 1/2 large carrot, finely chopped 1 small stalk of celery, including the green tops, finely ...