Arrange 2 pounds raw beef cubes or round steak in a roaster or casserole large enough to hold them in a single layer. Do not brown meat first. Put potatoes, carrots, onions and celery in layers on top of meat. Mix tomato sauce with 1 can of water and 1 teaspoon of sugar. Pour over meat and vegetables. Salt and pepper to taste. Scatter 2 teaspoons Quick Tapioca on top. Do not stir in. Seal roaster tightly in heavy foil. Place in 325° oven at least 2 hours. Do not open oven during recommended cooking time. When foil is removed, meat will be brown with gravy.