Cook ravioli as directed on package. Drain; cover to keep warm.
Meanwhile, heat oil in large skillet over medium-high heat until hot. Add onion and garlic; cook and stir 2 minutes. Add zucchini, corn and broth; mix well. Bring to a boil. Reduce heat; simmer 3 to 5 minutes or until zucchini is crisp-tender.
Add tomatoes, basil and cooked ravioli; cook 3 to 5 minutes or until thoroughly heated and slightly thickened, stirring occasionally. If desired, add salt and pepper to taste. Sprinkle with cheese. If desired, garnish with a fresh basil sprig.