ANSWER: As several readers correctly guessed, this is the Black Forest ham "Guest Sandwich" at . In addition to the ham, it has Swiss cheese, housemade dill pickles and honey Dijon mayo. It's grilled, and usually on rye.
Welcome to Week Three of a new JP Patch feature, one that I hope you'll find entertaining.
Each Saturday I'll post a photo from a dish I've eaten at a JP restaurant. In the comment section, make your guess about which restaurant served the meal. I'll circle back with the answer on Monday.
Take a look at this week's meal and Guess the Restaurant in the comments. Good luck!
(I'll give an extra hint this week: This sandwich came with different bread than was on the menu — it was late in the day and they were out of rye.)