In a large skillet, cook turkey over medium heat until no longer pink. Add the celery, green pepper and onion; cook until tender. Stir in the soup, water chestnuts, mushrooms, pimientos, soy sauce, salt and lemon-pepper. Reduce heat; simmer for 20 minutes., Remove from the heat; add sour cream and noodles. Spoon half into a freezer container; cover and freeze for up to 3 months. Place remaining mixture in a greased 2-qt. baking dish. Cover and bake at 350° for 30-35 minutes or until heated through., To use frozen casserole: Thaw in the refrigerator. Transfer to a greased 2-qt. baking dish and bake as directed.