How to make reuben sandwich
If your're wondering how to make Reuben sandwich, first spread the bread on one side with the butter, reserving a little butter for frying.
Lay a slice of cheese on top of the buttered side of 4 of the slices of bread.
Divide the corned beef between the slices, scatter over the capers and the sauerkraut, if using and top with the remaining cheese slices.
Place the remaining slices of bread, buttered side down, on top of the filling.
Heat the remaining butter in a frying pan and gently fry the sandwiches for about 2 minutes on each side.
Serve the Reuben sandwich immediately.