In heavy skillet, over medium heat, cook sugar, stirring constantly until melted and caramel colored. Pour into 9-inch round layer cake pan, tilting to coat bottom completely. In medium mixing bowl, beat eggs; stir in water, sweetened consensed milk, vanilla and salt. Pour into carmelized pan; set in larger pan ( a broiler pan). Fill pan with 1 inch hot water. Bake 55 to 60 minutes or until knife inserted near center comes out clean. Cool. Chill thoroughly. Loosen side of flan with knife; invert onto serving plate with fim. Garnish as desired. Refrigerate leftovers.