Start by seasoning the beef with the salt and pepper, then brown it in the skillet over medium heat. Once the beef is fully cooked, remove from the pan and set aside until later. Slice up the onion and green pepper. Add 1 tbsp of the butter to the skillet with the beef drippings. Fry the onion and peppers until browned. (about 4 minutes) Then set aside with the cooked ground beef.
Turn your oven on the broil to preheat for a few minutes, then add the remaining butter to the skillet, along with the minced garlic and basil. Let brown for 1 minute, then add the tomato sauce, heavy cream and garlic powder. Stir until combined, then let simmer for 1 - 2 minutes.
Add the cooked ground beef back to the skillet and stir until the beef is well coated. Add the peppers and onions to the pan and mix until the meat and veggies are combined. Cover the Cheesesteak and Veg with the provolone slices, then place in the oven on broil for 3 - 4 minutes or until the cheese is the desired meltliness.