During the last minute of cooking, top each patty with 1 slice of cheddar, 1 slice of American cheese, and 1 slice of Swiss cheese. Cover the skillet or close the grill to melt the cheese.
Assemble the Burger:
Toast the burger buns if desired.
Place the lettuce and tomato (if using) on the bottom bun.
Add the cheese-covered burger patty on top.
Spoon a generous amount of mac and cheese onto the patty.
Top with crispy bacon strips and add the top bun.
Serve:
Serve immediately with pickles and your favorite sides like fries or onion rings.
