https://tvline.com/interviews/greys-anatomy-spinoff-only-murders-in-the-building-season-3-episode-3-video-1235027558/#:~:text=In%20Season%203%20of%20Hulu,New%20Orleans%3A%20Family%20Burn%20Unit.

In Season 3 of Hulu's Only Murders in the Building, Meryl Streep's struggling actress Loretta Durkin lands the audition of a lifetime. “It's an offshoot of an offshoot of a Grey's Anatomy spinoff,” she explains in Episode 3 (out Tuesday). And the name of that spinoff is… Grey's New Orleans: Family Burn Unit.

Grey's Anatomy Star's Reaction To Only Murders Season 3's Grey’s New Orleans: Family Burn Unit Parody Revealed (https://screenrant.com/only-murders-building-greys-anatomy-joke-williams-reaction/)

Only Murders in the Building producer John Hoffman reveals how Grey's Anatomy alum Jesse Williams reacted to a new joke about the medical drama.