While panini press is heating up spread one tablespoon of softened butter on the outside pieces of the rye bread. Then spread one tablespoon of Russian Sauce on each side of the rye bread. Place Corned Beef on top of one side of bread followed by drained sauerkraut, and top with two slices of Swiss Cheese. Place second piece of bread on top of the sandwich (Russian sauce side down, buttered side up).
Place the sandwich on the panini press and cook for 5 minutes or until the panini is golden brown and cheese has melted. Serve with a pickle and additional Russian sauce if desired.