Los Angeles chef Sang Yoon is famous for doing things his way. He refuses to provide ketchup at his two Father's Office restaurants, where the burger is often cited as among the best in the nation.

Father’s Office Chef Sang Yoon Is Working on a Restaurant Drama for Fox ‘On The Line’ is inspired by Yoon. by Chris Fuhrmeister.

Chef Sang Yoon, Cookin' and Bookin' Before he opened his own place (a bar and restaurant in Santa Monica, Calif., called Father's Office) Sang Yoon served up gourmet cuisine at Michael's.