If there's one thing the Barefoot Contessa knows, it's her way around a kitchen. So when Ina Garten shares a hack for thinly slicing meat, we listen.

Shaved steak refers to any beef that is sliced super-thin. “Shaved steak is not a specific cut,” says Jae Kim, executive chef and owner of Hyun in New York City. “Any cut of beef can be shaved.

Add 1 lb. crimini mushrooms, thinly sliced, and remaining ½ tsp. Diamond Crystal or ¼ tsp. Morton kosher salt and cook, stirring often, until mushrooms release their liquid and brown slightly ...