Savory Ground Beef Cheesesteak Sandwiches

In a medium skillet, warm 1 tablespoon of olive oil over medium heat and sauté the diced green bell pepper, diced yellow onion, and diced portobello mushrooms until they begin to soften, about 5 minutes

Add the minced garlic, and cook for about 30 more seconds, then set the veggies aside

In the same pan, add the ground beef and cook over medium heat until there is no longer any pink showing

Stir in the salt, pepper, and Worcestershire sauce, then add in the veggies and stir until everything is combined

Split each sub roll and place a slice of provolone cheese on the bottom, scoop about 1/3 cup of the beef mixture on top, and then place another slice of cheese. Adjust the amount of cheese according to your preference

Spread softened butter on the outside of each sub roll, then place it on a skillet

Cook over medium-low heat for 3-4 minutes until the outside is browned and the cheese is melted