Cooking in the same pan, add the onions, carrots, peppers, zucchini and 1 tablespoon Knorr Tomato Broth Chicken flavor, stirring frequently, until golden brown, about 5 minutes. Add the garlic and stir; cook until it begins to give off a nice aroma, about 30 seconds. Add the canned tomatoes and put the chicken in the pan. Boil over high heat.