I decided to make cheesesteaks from my roast, and boy, was I disappointed in the advice I found on Youtube.
I should have known I was in for a wild goose chase when I saw that the guy doing the cooking ran a restaurant. Obviously, he's not going to tell the whole truth.
He said he cooks his cheesesteaks slowly to hold the juice in. I didn't get that at all. The longer something sits on a flattop, the dryer it gets, and if the heat is low, there is no browning, so no flavor. He and his customers also raved about Cheez Whiz, which I hadn't had in decades. I had forgotten how gross it was.
I made a sandwich using fairly high heat, and I fried some onions first in beef fat. I threw in some peppers. Then I made the mistake of applying Cheez Whiz. The sandwich was nasty. Cheese Whiz is like grainy Velveeta aged in an old boxing glove everyone at the gym uses and then leaves out in the rain. It smelled like dirty laundry, and not the kind of dirty laundry clean people have.
Velveeta would have been a thousand times better.
The next day I made a sandwich with American cheese, and it was really excellent.
A college buddy of mine lived in Delaware, and when I visited his family, we would have cheesesteaks from DiCostanza's or some other PA shop. He was a Far Eastern major, so he liked to run around Chinatown. We went to school in New York. He found a great steak sauce called Wan-Ja-Shan, and it was wonderful on cheesesteaks. Add a little hot sauce, and you have something great. Unfortunately, I have not been able to find it since. I found the company, but the sauce is gone.
I improvised. I mixed ketchup, hoisin sauce, and hot sauce. May sound nasty, but it was marvelous. I don't miss Wan-Ja-Shan any more.
I used about 4 parts ketchup, 1 part Huy Fong chili garlic sauce, and a few generous squirts of hoisin. The Huy Fong sauce disappeared for a long time, but it pops up locally sometimes, so I always snag a couple of jars.
My tip for the best cheesesteak possible: make it a calzone. I have done this, and it's on a completely different level. Also works for pan con lechon. Infinitely better than mushy fake French bread.