Patty Melt

In a medium skillet, combine sliced onions and 2 tablespoons of butter. Cook over low heat until onions are golden, about 20 to 25 minutes, stirring occasionally.

Meanwhile, combine beef, Worcestershire sauce, salt & pepper. Form the beef mixture into four thin patties shaped similar to the bread.

In a cast iron skillet, melt 1 tablespoon butter over medium-high heat. Add the patties and cook for 3 to 4 minutes on each side or to desired doneness. Transfer to a plate and set aside.

Top each slice of bread with the dressing and mustard if using. Add a slice of cheese, onions, and beef patty. Top with the remaining slice of bread.

In a clean skillet or on an electric griddle, melt 2 tableespoons of butter. Add the patty melts and cook for 3 to 4 minutes or until golden brown.

With a spatula, flip each sandwich over and grill on the other side, adding more butter as needed, until the cheese ismelted and the bread is lightly toasted.