I made this sandwich last year and forgot to post it, so here it is now. If you love turkey and shrooms you'll love this combination. The black truffle butter brings a savory sensational flavor to this sandwich. I really "gobbled" this up and wanted to make another one. Choose your favorite shrooms to add and let me know how you like it. --- I found the black truffle butter at a specialty shop and I've purchased it from a local restaurant as well.