In a large skillet, cook chicken and onions until chicken is no longer pink. Add tomato sauce, basil, and pizza seasoning. Mix well and set aside. In a bowl, combine one cup mozzarella cheese, cottage cheese, and parmesan cheese. (Refrigerate remaining mozzarella cheese until lasagna cooks.) Spread one-fourth chicken mixture into 6-quart slow cooker; top with five noodles, broken into pieces to fit. Spread with half the cheese mixture and one-fourth of the chicken mixture. Top with five noodles remaining cheese mixture and one-fourth chicken mixture. Top with remaining five noodles and remaining chicken mixture. Cover and cook on low heat for 5 five hours, or until noodles are done. Sprinkle top of lasagna with remaining mozzarella cheese. Cover and let stand for ten before serving.