Step number one. Add the ground beef to a large cast iron skillet (this browns very well) and brown until a deep brown crust appears before breaking the beef apart.
After that, Stir the ground beef and brown until a deep crust appears on about 50 or so percent of the beef.
Next, Remove the beef (you can leave the fat) and add the butter and the onions and bell peppers and mushrooms.
Thanks to: https://popularecipesofoodblog.com/2017/07/philly-cheese-steak-sloppy-joes-recipe.html
