I agree. I hope it wasn’t interpreted that I thought corned beef with Swiss and mustard was a Reuben. That’s not what I meant. It is just the way I most often eat corned beef.To me, a Reuben is kraut, swiss, and thousand island or kraut, swiss, and mustard. I love corned beef with cole slaw, swiss, and thousand island, and I assume I would with Russian. But to me that is not a Reuben. Neither is swiss and mustard. I think my favorite is really just corned beef on rye with mustard.