Heat oil in large saucepan over medium-high heat until hot. Add bell pepper, onion, zucchini and garlic; cook and stir 3 minutes or until vegetables are crisp-tender.
Add all remaining ingredients except ditalini and cheese. Bring to a boil. Add ditalini; cook 12 to 15 minutes or until ditalini is tender, stirring occasionally. Sprinkle individual servings with cheese.