In a skillet, cook beef, onion and garlic over medium heat until meat is no longer pink; drain. Add the tomato sauce, water, tomato paste, salt and oregano; mix well. Spread 1/4 of the meat sauce in an ungreased 5-quart slow cooker. Arrange 1/3 of the noodles over sauce, breaking the noodles, if necessary. Combine the cheeses; spoon 1/3 of the mixture over noodles. Repeat layers twice, topping with remaining meat sauce. Cover and cook on low for 4-5 hours or until noodles are tender. |