All ingredients should be at room temperature. Sift flour and salt into a bowl. Stir in milk, eggs and water. beat vigorously several minutes with a wire whisk. Cover and chill well about 1 hour. Meanwhile, heat the beef fat in a round pie plate placed in a 400-degree oven. When the fat is very hot, beat the batter again for several minutes and pour into a pan. Bake at 400 degrees for 1/2 hour and at 300 degrees for another 1 hour.