1.Heat The Soup And Water In A 1-Quart Saucepan Over Medium Heat Until The Mixture Is Hot And Bubbling, Stirring Occasionally. 2.Spread The Butter On The Bread Slices. 3.Place 4 Bread Slices, Butter-Side Down, Into A 12-Inch Skillet. Top With The Cheese Slices And Remaining Bread Slices, Butter-Side Up. Cook Over Medium Heat Until The Sandwiches Are Lightly Browned On Both Sides And The Cheese Is Melted.