I often make my own Ruebens at home - it's really easy, and comes out perfect every time, with no extra grease like most you get in a restaurant: 1. Mix mayo and ketchup to make Russian dressing 2. Spread over two pieces of rye, open faced (sorry for those who prefer a closed sandwich) 3. Spread corned beef - not very high 4. Spread sauerkraut over corned beef - lots of kraut is what makes a killer Reuben 5. Put one or two pieces of swiss on top 6. Bake in oven (or better yet a toaster oven) at 350 until the cheese melts, and then broil until the top turns slightly brown.