Rye bread
about 1/4 pound thinly sliced corned beef for each sandwich
Swiss cheese
Sauerkraut
Russian salad dressing
In this order: russian dressing on bottom slice, layer corned beef, top with slices of swiss cheese, and a layer of Sauerkraut.
Grill lightly, flipping sandwich at least once, so both sides toast, in a frying pan with butter until swiss cheese is melted.