Cut steak into 4 serving pieces. Dredge in flour mixed with salt; place in crockpot. Add chopped vegetables and worcestershire sauce. Pour tomato sauce over meat and vegetables. Cover and cook on Low for 8 to 10 hours or on High for 4 to 5 hours. Just before serving, sprinkle with grated cheese.
Recipe may be doubled for 5 litre crockpot. Cook the maximum time.