This old-school favorite combines the best of smashed burgers and grilled cheese sandwiches. On the Cook's Country TV show, Ashley and Julia make two sandwiches. This recipe serves four but can be halved as they have done (note that you'll need to cut all ingredients in half and decrease the cooking times for the onions). These patty melts boast juicy beef, jammy onions, perfectly melted cheese, and buttery griddled rye bread that's exquisitely crisp. To get there, we started with lightly toasted bread, making it sturdier and less susceptible to getting soggy, ensuring that it crisped nicely in the pan. Pressing out thin beef patties a bit larger than the slices of toast made for quick-cooking burgers with loads of flavorful crust and a consistent amount of juicy beef in every bite. Transferring the seared patties directly to the cheese (American for creamy melting, Swiss for nutty flavor) jump-started the melting process. Further, it protected the toast from getting soggy with beef juices. Finally, cooking the sliced onions covered with a bit of water (and the flavorful fond left from searing the beef patties) and then uncovered with additions of ketchup, brown sugar, and Worcestershire sauce created a quick caramelized, sweet-savory onion jam that took these patty melts to the next level.