I made this using lite mayo and it still turned out wonderful. I used weck rolls that we brought back from NY, sliced open and spread sauce on both halves of the roll. I added the roast beef and swiss and popped them (still open faced) under the broiler to melt the cheese and toast the roll. Delicious!! I had used petite rolls, not knowing if we would like them. Boy do I regret that decision. I will use the big rolls next time for sure!!
What an easy recipe that makes for a delicious lunch! I made 6 sandwiches and increased the ingredients accordingly. I had some wonderful rare roast beef, and I used onion rolls for extra flavor. The spread was tangy and worked well with the beef. Definitely a keeper!