Marshall Field's is no longer in existence, but if you very lucky enough to have one of these sandwiches, you will love making these at home. It clearly make a HUGE sandwich so share with a friend. I typed the recipe as submitted by: Deborah Loeser Small, Lake Magazine "The Walnut Room. Marshall Field's Special Sandwich. Some things cannot be improved upon. In the 1970s I learned to make "Field's Specials" at a part-time job in the kitchen of Field's Old Orchard store, Skokie, Ill. These "sandwiches" are in fact mountainous, delightful salads. Two or three outside corporate owners later, the Special doesn't appear on any Field's menu (although the Walnut Room will make them on request)--but here is the step-by-step way to make it at home. I've also included my personal recipe for Thousand Island dressing. FYI: This is fantastic use of left over Thanksgiving turkey."