5-Star Superb! YOU HAVE TO TRY THESE! I made a double batch of this appetizer to take to a Christmas gathering (I was able to broil them at the party; I don't recommend taking them anywhere if you can't broil them there because they are much better right out of the broiler. But also not bad after sitting out for awhile!). I made them a week in advance using the make ahead directions (freeze 'em) - couldn't get any easier. In my opinion, these are an awesome appetizer ANY time of the year, not just on St. Patty's Day. They taste EXACTLY like a little Reuben! I can't imagine using anything BUT Grey Poupon for these, so don't substitute. The only thing that I did differently: I did NOT toast the cocktail rye before I topped them. In my mind, I didn't want that big of a crunch. When broiled, the edges crisp up, but the bottom/underside stays soft and warm. It was exactly the way I wanted it. I'm making more of these today to throw in the freezer for any time munchies or for whe