In medium saucepan, combine broth and oil; bring to a boil over medium-high heat. Add onion and garlic; cook until onion is soft but not browned. Add remaining ingredients; bring to a boil. Reduce heat; simmer, uncovered, for 15-20 minutes or until thickened, stirring occasionally. If desired, cool slightly and puree in blender container or food processor bowl with metal blade until smooth. Serve hot over cooked pasta, meat or chicken.