Here's a great sandwich we copied from the Clam Digger, a funky restaurant in the Pike Place Market in Seattle in the late 1960's. It's been a family favorite ever since.
The Devil On Horseback sandwich:
Mix together chopped corned beef, shredded sharp cheddar cheese, finely diced seeded jalapenos, and chopped scalliions in about that descending order of quantity (we just copied ingredients off their menu, so you'll have to experiment) with enough Russian dressing to bind. Mound generously on a large slice of good rye bread, top with more dressing and sprinkled cheddar plus a few more pieces of scallion, and put under the broiler in a preheated oven until all is well heated through and beginning to brown on top. You will have to figure out which oven shelf best achieves that.
That Seattle restaurant is long gone, so you can probably use the name (I have no idea how they picked it - probably some veiled reference to the jalapeno) without fear of a lawsuit. I hope you would use that name, as a tribute to a really nice restaurant.
Speaking of lawsuits, though... I will expect a suitable royalty on your sales of this really neat sandwich!
You guys can probably figure out a suitable beer pairing yourselves.