Sausage and cheese stuffed shells

Sausage and Cheese Stuffed Shells
Ingredients:
1 pound Italian sausage
1 onion, diced
1 (8 oz) package cream cheese
1 egg, lightly beaten
2 cups shredded mozzarella cheese, divided
2 cups shredded cheddar cheese
1 cup low-fat cottage cheese
1 cup grated Parmesan cheese
1/4 teaspoon salt
1/4 teaspoon pepper
24 jumbo pasta shells, cooked and cooled
1 (26 oz) jar pasta sauce

Directions:

Spray a 9x13" baking pan with non-stick cooking spray.
Brown sausage and onion over medium heat in a large saucepan; when meat is no longer pink, drain. Transfer meat to a large bowl. Add in the spinach, cream cheese and egg; stir well. Add 1 cup mozzarella cheese, all the cheddar cheese, cottage cheese, Parmesan cheese, salt, and pepper and mix once again.
Stuff pasta shells with sausage mixture and place stuffed shell in prepared pan. Once all the shells are stuffed, spoon the sauce over the shells.
Cover and bake at 350° for 45 minutes. Uncover; sprinkle with remaining mozzarella. Bake 5-10 minutes longer or until bubbly and cheese is melted. Let stand for 5 minutes before serving.