Saut� onions and celery in oil in a stockpot over medium high hear for 5 minutes, or until tender. Stir in garlic, zucchini and corn; saut� 2 minutes. Add chicken stock, bring to a boil and add remaining ingredients except Parmesan. Cook until pasta is tender, about 10 minutes. To serve: Spoon 1-1/2 Cups soup into each bowl. Top each with 1 tsp. Parmesan cheese.