Start by dividing the ground beef into two equal portions and shaping them into oval-shaped patties, slightly larger than your slices of bread.
Season both sides of the patties with a pinch of salt and pepper.
Caramelize the Onions
Heat a skillet over medium-low heat and add 2 tablespoons of butter.
Once the butter has melted and is bubbling, add the thinly sliced onions to the skillet.
Cook the onions slowly, stirring occasionally, until they become soft and golden brown. This should take about 10-15 minutes.
Remove the caramelized onions from the skillet and set them aside.
Cook the Beef Patties
In the same skillet, increase the heat to medium-high and add the remaining 2 tablespoons of butter.
Place the beef patties in the skillet and cook for about 3-4 minutes on each side, or until they reach your desired level of doneness. For medium-rare, aim for an internal temperature of 135°F (57°C).
During the last minute of cooking, place a slice of American cheese on top of each patty and cover the skillet with a lid. This will help melt the cheese.
Toast the Bread
While the patties are cooking, toast the rye bread slices until they are golden brown. You can use a toaster or a griddle for this step.
Assemble the Patty Melt
To assemble the patty melt, place a slice of toasted rye bread on a plate.
Place a beef patty with the melted cheese on it.
Spoon a generous portion of caramelized onions over the patty.
Top with another slice of toasted rye bread.
Serve and Enjoy
Repeat the assembly process for the second patty melt.
Serve your homemade Waffle House Patty Melts while they are hot and gooey, alongside your choice of side dish from the suggested options.
Dig in and savor the irresistible flavors of this classic diner delight!