1/4 cup butter, unsalted
1 green bell pepper, sliced up in strips
1 package of sliced mushrooms
1/4 cup Worcester sauce
1 tablespoon Franks
Melt 2 tablespoons of butter, then brown it. I love brown-butter. Don't make it black-butter though. It turns brown by cooking it on high, and slightly burning the milk-proteins, maybe 2 minutes, but watch it! Cook the peppers and mushrooms for maybe 5 minutes, till tender and browned. Remove.
Repeat the browning of the last 2 tablespoons of butter, in the same pan. Coat up the steak with a lot of lemon pepper, salt and pepper. Put in the steak, cook it till it's browned. This takes not long at all, maybe 4 or 5 minutes. Add the mushrooms and peppers, along with the Worcester and Franks. Cook together for around 5 minutes, on a low heat.
Serve on a toasted sub bun. Make sure and spoon some of the pan sauce on top.
If you are looking for "healthier", try replacing the butter with olive oil. But, you can't brown olive oil, FYI.
I got this idea from Pioneer Woman, but changed it quite a bit. As, the Bberg's don't do onions!