Before every Los Angeles pub was "gastro," chef/owner Sang Yoon was hellbent on creating not just a better burger but the best burger. He came up with a formidable combination of sweet onion jam, Gruyere and Maytag blue cheeses, smoky bacon, arugula and tomato compote on top of dry-aged beef. Since then, everyone has either been imitating, trying to improve on or bellying up to the bar for a bite.