The sirloin steak on these sandwiches is rubbed down with a seasoning mix of salts and spices and placed in the refrigerator for several hours to work into the meat.
The ingredient that makes these sandwiches taste so good is the smattering of horseradish sauce. The horsey sauce makes this sandwich like an Arby’s roast beef on steroids. And with crunchy sweet onions and an addition of bread and butter pickles, every bite is better than the next!