To construct the sandwiches, over parchment or wax paper, butter each slice of bread evenly to the edges on one side. Flip four of those slices over and spread with 1 tablespoon Thousand Island dressing. Top each with 1 slice of Swiss cheese, 1/2 cup sauerkraut, 1/4 pound of corned beef, 1 slice of Swiss cheese and second piece of bread, butter side up.
Grill sandwiches in a skillet over medium heat, until both sides are golden brown and the cheese is melted (about 5 minutes each side). Remove from skillet, cut sandwich in half and serve.
Cooks Note: To make a Rachel Sandwich, substitute pastrami for the corned beef and top with coleslaw instead of sauerkraut.