Mix beef, pork, onion, garlic, Italian seasoning, bread crumbs, and egg. Shape mixture into twenty-four 1 1/2 inch balls. Place a rack in your slow cooker and place meatballs onto rack. Cover and cook on low setting for 6-7 hours (this was too much time for my cooker. I would put it in for about 4 hours in my 6 quart slow cooker). Serve meatballs with spaghetti, if desired, and pour warmed marinara over the top.
Recipe Source: Betty Crocker’s More Slow Cooker Recipes