Fry 2 T. of flour a few seconds. Then add 2 C. of oxtail stock. Mix thoroughly until it becomes a paste. Then add 3 T. of ketchup, 2 T. of soy sauce, and 1 / 2 t. of salt.
３．用三湯匙豬油（或沙拉油）以小火炒香二湯匙麵粉，並將牛尾湯加入二杯，迅速攪拌成糊狀，再加蕃茄醬三湯匙，醬油二湯匙，鹽半茶匙，味精少許，並將煮爛之（第２項）蔬菜倒入同煮三分鐘。