Spinach And Turkey Lasagna

Ingredients

• 9 whole-wheat lasagna noodles
• 1 teaspoon olive oil
• ½ cup chopped onion
• 1 pound ground turkey breast
• 3 cups tomato sauce
• ½ cup sliced fresh mushrooms
• 3 tablespoons Italian seasoning
• ¼ teaspoon ground black pepper
• ¼ teaspoon garlic powder
• 6 cups chopped fresh spinach
• 2 cups fat-free ricotta cheese
• ¼ teaspoon ground nutmeg
• 2 cups shredded mozzarella cheese