Easy Slow Cooker Meatballs

In a bowl, mix the ground beef, bread crumbs, parsley, garlic, onion, and egg. Shape the mixture into 16 meatballs.

In a slow cooker, mix the spaghetti sauce, crushed tomatoes, and tomato puree. Place the meatballs into the sauce mixture. Cook on Low for 6 to 8 hours.