Stuffed Pasta Shells

1/2 lb. ground beef, browned and drained
1/2 cup onion, chopped
1 cup grated mozzarella cheese
1/4 cup seasoned bread crumbs
1 t. minced garlic
1 1/2 t. dried parsley
1 egg, beaten
18 jumbo pasta shells, partially cooked*
2 jars spaghetti sauce
1/2 cup grated Parmesan cheese

Combine beef, onion, mozzarella, bread crumbs, garlic, parsley, and egg. Stuff partially cooked pasta shells with spoonful of meat mixture. Pour one jar of spaghetti sauce in greased slow cooker. Place stuffed shells on top of sauce. Pour remaining sauce evenly over pasta. Sprinkle with Parmesan cheese. Cover and cook on LOW 4-5 hours. DO NOT OVERCOOK.
*Only cook jumbo shells 7 mins. in boiling water. They will become mushy if overcooked.