Heat avocado oil in a medium-sized pan on medium-high heat. I used a 10 1/2-inch pan.
Season your steak with a bit of salt and pepper.
Cook the steak in two parts. If you put too much in the pan, it won’t cook well. Once it's browned, take it out and put it aside.
In the same pan, add 1 tablespoon of butter along with peppers, onions, garlic, and mushrooms. Cook until they're soft.
Pour in beef broth, Braggs Aminos, Worcestershire sauce, and some more salt and pepper. Cover the pan and let it simmer for about 4 minutes.
Put the cooked steak back into the pan and let everything cook together for 2 minutes on medium heat.
Lay the provolone cheese on top, covering everything in the pan.
Move the pan to your oven on the broil setting for 1-3 minutes. Keep an eye on it; the cheese can burn quickly!