There’s no question that this is a burger lover’s burger. But what really makes it special is the beef, provided by master purveyor Pat LaFrieda. Made with a custom short rib blend from American raised and grazed Black Angus cattle, it’s chopped, rather than ground, to give it a coarse, meaty texture. All it needs to shine is some simple but satisfying toppings. Here, that’s balsamic caramelized onions and a garlicky aioli.