Saute onions, mushrooms and garlic until onions are clear. Add zucchini and cook until it is crisp-tender. Drain excess water from the skillet.
Add mozzarella cheese and allow to melt.
Meanwhile, cook pasta according to package directions.
Drain pasta and add 1 jar spaghetti sauce to pasta.
Serve pasta topped with veggie mix.
I often make this recipe as three separate pieces -- pasta, veggies and cheese, and let each of us assemble our own. In addition, I also will marinade a chicken breast in Italian salad dressing and then cook it up in strips or cubes and add to this delicious goodness.