Baked Ziti with Sweet Turkey Sausage

Name: Baked Ziti with Sweet Turkey Sausage
Ingredients: 1 pound ziti noodles; 1 pound sweet turkey sausage, cut into 1/2-inch thick slices; 2 (28-ounce) cans diced tomatoes with seasonings (green pepper and onion or garlic and oregano, or any flavor you want); 2 teaspoons dried thyme; 2 teaspoons dried rosemary; 1 (15-ounce) container regular or part-skim ricotta cheese; 4 cups grated part-skim mozzarella cheese, reserve 1 cup, for topping; 1 teaspoon garlic powder; 1/2 cup grated Parmesan