You can use either corned beef or pastrami for this whatever you like the best.
Mustard too is whatever you like.
4 slicerye bread, we like the seeded
10 smallsquirts liquid butter, on one side each of the slices of bread
4 sliceswiss cheese, one for each slice of bread
4 to 5 tspgrainey deli mustard for each slice of bread
3 to 4 ozcorned beef,or pastrami sliced very thinly so you can stack it
4 Tbspor more sauerkraut, to your liking
4 Tbspthousand island dressing