So crispy on the outside! So rich and melting on the inside! Roger, you’ve got to get a panini press. Under the broiler is not the same.
Spread two pieces of bread with coarse grain mustard, then layer with ham, 2 pieces of swiss cheese and sauerkraut. Brush melted butter on the outside of the bread and grill in a panini press, cast iron skillet or, if you must, under the broiler.