Beef Stroganoff without breadcrumbs soup chips

1 pound sirloin steak cut into thin strips 3 tablespoons flour, all-purpose divided 1/2 teaspoon salt 4 tablespoons butter or margarine 3 ounces mushrooms,[...]

2 pounds beef, tenderloin 2 tablespoons butter 1 tablespoon onion minced 2 tablespoons butter 1/2 pound mushrooms 1 x salt * 1 dash nutmeg * 1/2 pint sour[...]