Madonna appears to have a new favorite restaurant in NYC. The 50-year-old singer dined at the Waverly Inn twice in one week recently, and the big draw seemed to be a certain entrée on the menu.

"She had the salmon with lentils," says an onlooker who spotted Madonna dining with pals Gwyneth Paltrow, Truth or Dare director Alek Keshishian and Jerry and Jessica Seinfeld on Jan. 14. Adds an insider, "She looked good!"

Indeed, these days Madonna is on a special "salmon retox" diet in an effort to turn back the clock. "She believes the omega-3 oils in salmon make her look younger and more radiant," reveals the insider.

For more on how Madonna's keeping the years at bay, pick up the latest issue of Life & Style, on newsstands now!

Photo Credit: Splash