Black and Blue Steak Burger
This will also work with cheaper cuts like chuck, or round, but there's a certain luxury to starting out with meat that's already tender before it's even chopped. If you can find some extra flavorful dry-aged beef, this will be even more memorable.
Feel free to use no cheese, or a different variety, but the blue cheese promises impressive crustification.
To make your own quick-pickled red onions, season 1 sliced red onion with a big pinch of salt, cover with red wine vinegar, and refrigerate overnight, or until the onions turn color and soften slightly.