Stuffed Spinach and Sausage Shells

1 box Jumbo Shells
1 pound ground turkey sausage
6 oz. baby spinach, chopped
1 medium onion, chopped
1 garlic clove, minced
1 teaspoon salt
1/4 teaspoon ground pepper
1/8 teaspoon ground nutmeg
1 egg
1/4 cup grated Parmesan cheese
1 jar of 32 oz. tomato-basil sauce
1 cup mozzarella cheese, shredded

Cook jumbo shells according to package directions. Drain, reserving 1/3 cup of the pasta cooking water.
Cook ground turkey sausage until no longer pink. Add spinach, onion, garlic, reserved pasta water and continue cooking for 10 minutes, stirring occasionally. Remove from heat. Add seasonings, blend well and let cool. Stir in egg and cheese. Pour one cup of the tomato sauce in a 13x9" baking dish. Fill shells with mixture and place in dish. Pour remaining sauce over shells and sprinkle mozzarella cheese over the top. Cover with foil and bake at 350 degrees for 30 minutes or until thoroughly heated.