While the pasta cooks, saute the onion, celery and garlic in 1/4 cup water for 3 minutes in a large oven-proof skillet. Add mushrooms; cook and stir until vegetables are tender. If need, add a little more water to the pan while you cook the vegetables. The water eliminates the need for cooking in oil.
Add the milk, seasoning blend and salt. Bring to a boil.
In a small bowl, whisk together the cornstarch and half-and-half until smooth; stir into skillet. Cook and stir for 2 minutes or until thickened and bubbly. Stir in Parmesan cheese just until melted.
Stir in turkey. Drain fettuccine; add to turkey mixture. Heat through.
Sprinkle with mozzarella cheese. Broil for 2-3 minutes on the middle rack or until cheese is melted. Sprinkle with fresh parsley and serve. Yield: 6 servings.