This Patty Melt recipe features homemade juicy beef patties layered with melted Monterey Jack or Swiss cheese, caramelized onions, and a tangy burger sauce, all sandwiched between crispy, buttery sourdough or rye bread. Cooked on a griddle or cast iron pan, it delivers the perfect balance of savory, sweet, and tangy flavors for an unforgettable American classic sandwich.