People seek it out instead for a dish of aged lamb called the mutton chop. This is Keens Steakhouse, and it's been standing here since 1885. Customer: I brought my nephew, and he had the mutton chop.

The chops at this Midtown institution ... photo credit: Kate Previte The signature dish at Keens is an essential order. Technically year-old lamb, not mutton, this glorious, two-inch-thick piece ...