In a large skillet, heat 1 Tbs of olive oil over medium-high heat. Add the ground beef and cook until browned and cooked through, about 5 to 7 minutes.
Add the onions, bell pepper, mushrooms, and seasoning. Sauté until the vegetables are tender, about 7 to 9 minutes.
Add the beef broth, ketchup, and Worcestershire and simmer for over medium heat for 5 minutes.
Add the cheese and remove the skillet from the heat. Stir in the cheese until melted and smooth. Taste for salt level and add more if desired.
Brown the beef in a sauté pan over medium heat, breaking the beef into small pieces while browning.
Drain the grease from the pan and add the salt, black pepper, onion powder, and garlic powder. Continue to sauté for another 3 to 5 minutes.
Add the beef broth, Worcestershire, and sugar. Simmer for another 5 to 10 minutes to reduce the liquid.
Prepare your sandwich by placing pickles on the bottom bun, topping with a slice of american cheese if you would like a “cheese rite,” add a couple spoons of the beef (about 4 oz) and top with diced onions and mustard. Enjoy!