Receta Corned Beef Panini with Caramelized Guinness Onions

What do you do with leftover corned beef?  We make these delicious Corned Beef Panini with Caramelized Guinness Onions and celebrate St. Patrick's Day all over again! Marble rye bread, corned beef, cheddar and Guinness infused onions make this "corned beef" version of a patty melt My family adores corned beef, so when I make it, I make a lot. By a lot, I mean 3 - 4 flats in one shot. I make a lot because we love the leftovers!  Corned beef is so easy to prepare and it's so versatile in These delicious Corned Beef Panini with Caramelized Guinness Onions are the prefect way to re-purpose corned beef leftovers.  Think of them like a corned beef patty melt!  Who doesn't love a good patty Corned Beef Panini with…