2 Tbsp vegetable broth (low sodium)1 large onion, chopped 2-3 garlic cloves, crushed or minced finely 1 celery stalk, chopped finely 4 -6 oz mushrooms, chopped 1 medium red bell pepper, chopped finely 1small/medium zucchini, diced (optional) 28 oz crushed tomatoes (low sodium – Dei Fratelli is a good brand) 28 oz tomato puree (low […]