How to Make London Broil

London broil lives in our collective imagination, but there’s really no such thing on a steer. That is to say that London broil refers to a method of grilling and carving a thick steak, not to a particular cut of meat. The steaks used tend to be tough and flavorful, such as thick cuts like top round or bottom round, or even the thinner cut, flank steak. The genius of the London broil lies in the way you carve it: sharply on the diagonal to minimize the length of the tough meat fibers. This makes a tough cut tender, and it gives you broad meaty slices that are charred on the outside, delectably rare on the inside, and that look drop-dead delicious carpeting your plate. Top London broil with grilled scallions and mushrooms.