Creamy Creole Turkey Bake

Serves 4.

2/3 cup chopped onion
2/3 cup chopped celery
1/3 cup chopped green bell pepper
1 garlic clove, minced, or 1/4 teaspoon garlic powder
1 tablespoon butter
1/4 pound fresh mushrooms, sliced
4 ounces cream cheese, softened
1 (8 ounce) can stewed tomatoes, drained
1 1/2 teaspoons Creole seasoning
4 ounces fettuccini, cooked according to package directions
2 cups 1/2-inch cubed cooked turkey
Vegetable cooking spray
1/4 cup grated Parmesan cheese

In medium nonstick skillet, over medium-high heat, saut