Heat oil in a dutch oven over me-high heat until hot. Add onion, carrot, and celery to pan. Saute vegetables 5 min. Add garlic, and saute 1 min. or until vegetables are tender and mixture smells good. Stir in broth, chicken and thyme. Bring to boil, reduce heat, and simmer, stirring occasionally, 15 min. Stir in pasta and cook 8 min. or until pasta is tender.