01 -
Divide the ground beef into three equal portions and shape them into patties slightly larger than the rye bread slices.
02 -
Season both sides of each patty with onion powder, garlic powder, salt, and pepper.
03 -
Heat a large skillet over medium-high heat. Cook each patty for 4-5 minutes per side, until browned and cooked through. Set aside.
04 -
In a small bowl, combine mayonnaise, chopped bacon, ketchup, sugar, and relish. Mix until well blended.
05 -
Spread softened butter on one side of each slice of rye bread.
06 -
Place three slices of buttered bread, buttered side down, in the skillet. Layer two slices of provolone cheese, a cooked patty, two slices of cheddar cheese, and spread the secret sauce on the non-buttered side of the remaining bread slices. Place these on top, sauce-side down.
07 -
Cook over medium heat for 3-4 minutes, until the bottom is golden brown and the provolone cheese is melted.
08 -
Flip the sandwiches carefully and cook for an additional 3-4 minutes, until the cheddar cheese has melted and the bread is crispy.
09 -
Let the patty melts cool slightly before slicing in half. Serve with extra secret sauce on the side for dipping.