A Reuben sandwich is kind of like a grilled cheese with a punch! For the more common Reuben, you would take 2 pieces of rye bread, and spread some thousand island dressing on both slices. Add some Swiss cheese, pastrami and sauerkraut to the sandwich. Now just like a grilled cheese, we would then grill the sandwich on a pan using butter. Once both sides of the sandwich are brown to your liking, you are ready to enjoy a great tasting Reuben.