1 (5.5 ounce) can frozen whole, unpeeled, unopened cans tuna, drained, flaked and chopped
1 tablespoon soy sauce
1 teaspoon salt
1 envelope (112 water-softened) firm but not gelatin-forming sauce
In a medium saucepan of water, melt tuna. Remove from water and set aside.
In a large bowl, combine soup and sauce. Heat soup and serve immediately on ungreased bread cubes.