Cook pasta in large saucepan as directed on package, omitting salt.
Meanwhile, heat oil in large skillet on medium heat. Add zucchini, mushrooms and garlic; cook and stir 3 to 4 minutes or until zucchini is crisp-tender. Add broth; cook and stir 2 to 3 minutes or just until mixture comes to boil. Add Cooking Creme; cook and stir 2 to 3 minutes or until heated through.
Drain pasta; return to pan. Add zucchini mixture, spinach, basil and 1/2 cup mozzarella; mix lightly. Spoon into 9-inch baking dish sprayed with cooking spray; top with remaining mozzarella.