For the hoagies:
Preheat frying pan over medium-high heat. Cut the hoagie rolls horizontally to open up and make a pocket. Add the blended oil to the pan and stir in the onions. Put the steak on top of onions and add 1/2-ounce of the butter. Cover the pan for 2 1/2 minutes. The meat should have a cooked appearance on top and rare underneath. Using a fork and spatula separate steak from the onions. When the meat is cooked add the salt, remaining butter, and provolone. Cover to the pan to melt the cheese. Divide the steak mixture among the hoagie rolls and serve. If you like, you can add the optional ingredients to the steak mixture before serving.
If you desire, feel free to add mushrooms, bell peppers or homemade tomato sauce to the onion-steak mixture or use a different type of cheese.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of John Nigro, owner of Sonny's Famous Steak Hoagies in Hollywood, FL.