In A Heavy Saucepan Over Medium Heat, Bring Water, Butter And Salt To A Boil. Add Flour All At Once; Stir Until A Smooth Ball Forms. Remove From The Heat; Let Stand For 5 Minutes. Add Eggs, One At A Time, Beating Well After Each Addition. Beat Until Smooth And Shiny. Drop By Tablespoonfuls 3 In. Apart Onto Greased Baking Sheets. Bake At 400