Yields as many sandwiches as you want!
Using a cookie cutter or a knife, cut out both types of bread into squares. With the sandwich filling, make into sandwiches.
Arrange sandwiches on a platter in a checkerboard pattern, alternating the white and pumpernickel breads.
Pierce olives and tomatoes with toothpicks and attach to the checkerboard.
Use the crusts and scraps from the bread to make your own homemade croutons.