Creamy Tuna And Cucumber Sandwich Spread Recipe

In a medium bowl, mix tuna, mayonnaise, and prepared mustard. Season with salt and ground pepper to taste. Chill until ready to serve. 

If desired, spread softened butter onto both sides of three bread slices. Toast until golden brown. Place cucumber slices onto a bread slice then top with tuna filling. Place a second slice on top and top with cucumber slices. Top with more tuna filling and place the third bread slice on top. Slice in half and serve immediately.