Have meat cut into individual servings. Mix flour, salt and pepper. Place on board and roll meat slices well in this. Melt about cup shortening in large skillet and brown meat in installments on both sides. Add more shortening with each installment of meat as needed. Transfer meat as it is cooked to large baking pans. When all the meat has been browned, add sliced onions to fat remaining in skillet and cook 3 or 4 minutes until lightly browned. Sprinkle with cup of flour and stir until well blended. Add 3 quarts water gradually and season to taste with salt and pepper. Stir until gravy thickens. Pour over meat, cover and bake in slow oven (300 F.) about 2 hours until tender. Yield: 50 servings.
Note: 1 pound sliced mushrooms may be cooked with the onions, if desired.