A traditional patty melt is composed of a beef patty topped with caramelized onions, cheddar, and Swiss cheese smashed between two slices of rye. It's like if a burger and grilled cheese made out, and let me tell you, it's hot. But just as there's no one way to make a grilled cheese, there are also endless patty melt combos, as this dozen demonstrates.
To make things easy, each uses the same patty recipe -- ground chuck with a couple dashes of Worcestershire, a dash of garlic powder, a pinch of salt, and a couple grinds of black pepper. Then, flatten the meat to ¼-inch thick and roughly the same dimensions as the bread you're using. Heat oil in a large cast-iron skillet over medium-high heat, then cook the patty, pressing gently, until browned, about 2 minutes per side. If you're using caramelized onions, follow these steps to make them perfect.
Now, the only problem is deciding which melt to make first.