Saute onions and celery in oil in a stockpot over medium high heat for 5 minutes, or until tender. Stir in garlic, zucchini; saute 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 with 1 tsp. Parmesan cheese.
Makes 20 (500g) sevings.