Mix tomatoes, tomato sauce, sugar and seasonings in medium saucepan. Bring to boil on medium heat. Reduce heat to low; cover and simmer 20 minutes.
Heat oil in large skillet on medium-high heat. Add zucchini, mushrooms and onion; cook and stir 4 minutes or until vegetables are tender-crisp. Stir tomato sauce into vegetables.
Meanwhile, cook pasta as directed on package. Drain well. Place pasta in serving bowl. Add vegetable mixture; toss well.