
The only ingredients in an Authentic Philly cheesesteak are thinly sliced steak, fried onions, and cheese! This Philly cheesesteak recipe is true to the original Cheesesteak sandwich and is made with tender shavings of beef, sauteed onions, and cheese all tucked inside bread!
Thinly shave partially frozen beef, using a mandoline slicer. You can use a sharp knife but a meat slicer makes incredibly thin steak shavings!