Slow Cooker Meatballs and Sauce

1 1/2 pounds ground beef or turkey
1 1/4 cups Italian seasoned bread crumbs
1/4 cup chopped fresh parsley
2 cloves garlic, minced
1 medium onion, chopped
1 egg, beaten
1 (28 ounce) jar spaghetti sauce
1 (16 ounce) can crushed tomatoes
1 (14.25 ounce) can tomato puree
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In a bowl, mix the ground beef or turkey, 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.
Serve over cooked spaghetti noodles.